Catequentinib, Anlotinib

Catequentinib

C₂₃H₂₂FN₃O₃  407.4 g/mol

1-[[4-[(4-fluoro-2-methyl-1H-indol-5-yl)oxy]-6-methoxyquinolin-7-yl]oxymethyl]cyclopropan-1-amine

1058156-90-3

CAS No. 1360460-82-7 DI HCL

Anlotinib

AL3818

UNII-GKF8S4C432

Chia Tai Tianqing Pharmaceutical Group Co Ltd

Launched (Metastatic non small cell lung cancer – China – May-2018)

Orphan Drug; Priority Review

MOA：VEGFR inhibitor

Indication：advanced gastric adenocarcinoma; Advanced renal cell carcinoma (RCC); Medullary thyroid cancer (MTC); Metastatic colorectal cancer (CRC); Non small cell lung cancer (NSCLC); Soft tissue sarcoma; Ovarian cancerStatus：Phase III (Active)

AL-3818 ; AL-3818, Jiangsu Chia-tai Tianqing Pharmaceutical ; FOCUS-V ; FuKeWei ; VEGFR2/VEGFR3 inhibitor (capsule, cancer), Jiangsu Chia Tai Tianqing Pharmaceutical ; anlotinib ; anlotinib dihydrochloride ; catequentinib ; catequentinib ; catequentinib dihydrochloride

NMR  https://file.selleckchem.com/downloads/nmr/S872601-Anlotinib-AL3818-hnmr-selleck.pdf

Anlotinib (AL3818) is a highly potent and selective VEGFR2 inhibitor with IC50 less than 1 nM. It has broad-spectrum antitumor potential in clinical trials.

Anlotinib dihydrochloride is in phase II/III clinical trials for the treatment of metastatic colorectal cancer and advanced gastric adenocarcinoma. The compound was co-developed by CTTQ Pharmaceutical (正大天晴) and Advenchen Laboratory.

It is also in phase II clinical trials for the treatment of ovarian cancer, endometrial cancer, non small cell lung cancer (NSCLC), medullary thyroid cancer (MTC), soft tissue sarcoma and advanced renal cell carcinoma (RCC).

In 2015, orphan drug designation was received in the U.S. for the treatment of ovarian cancer.

PATENT

WO 2016179123

https://patents.google.com/patent/WO2016179123A1/en

new process to synthesize l-((4-(4-Fluoro-2-methyl- lH- indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropanamine (AL3818) by condensing intermediate (XI) with (Yl) in a solvent at the presence of KI or Nal, or intermediate (X2) with (Y2) in a solvent to form intermediate (Z) which is deprotected to give the final compound (AL3818) in Scheme I. A stable crystalline form of l-((4-(4-Fluoro-2 -methyl- lH-indol-5-yloxy)-6- methoxyquinolin-7-yloxy)-methyl)cyclopropanamine and its salts as well as crystalline forms of salts have also been prepared.

Wherein, R is selected from H and Ci-Cealkoxy.

Process A

R is selected from H and C1 -C6 alkoxy

The final compound (AL3818) was prepared according to Process Al when R is H by deprotecting intermediate (Z-l) with HCOONH₄ (ammonium formate) and Pd/C in an alcoholic solvent, such as MeOH, at 25°C-80°C for 0.1-4 hours. (Z-l) was prepared by reacting intermediate (XI) with (Yl-1) at the presence of KI or Nal with K₂CO₃ in a solvent, such as acetone or DMF, at a temperature of 60°C-160°C for 2-24 hours.

Process Al (R=H)

The final compound (AL3818) was prepared according to Process A2 when R is 4-OMe by deprotecting intermediate (Z-2) with TFA in DCM at 0°C-30°C for 1-24 hours. (Z-2) was prepared by reacting intermediate (XI) with (Y 1-2) at the presence of KI or Nal with K₂C0₃ in a solvent, such as acetone or DMF, at a temperature of 60°C -160°C for 2-24 hours.

Process A2 (R=4-OMe)

The present invention relates a new process to synthesize l-((4-(4-Fluoro-2 -methyl- 1H- indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropanamine (AL3818) by reacting intermediate (X2) with (Y2) in a solvent to form intermediate (Z) which is deprotected to give the final compound (AL3818) according to Process B. Proce B

R is selected from H and C1-C6 alkoxy

The final compound (AL3818) was prepared according to Process Bl when R is H by deprotecting intermediate (Z-1) with HCOONH₄ (ammonium formate) and Pd/C in an alcoholic solvent, such as MeOH, at 25°C-80°C for 0.1-4 hours. (Z-1) was prepared by reacting intermediate (X2-1) with (Y2) in a solvent, such as pyridine or lutidine, at a temperature of 60°C – 160°C for 1-12 hours.

Process Bl R=H)

The final compound (AL3818) was prepared according to Process B2 when R is 4-OMe by deprotecting intermediate (Z-2) with TFA in DCM at 0°C-30°C for 1-24 hours. (Z-2) was prepared by reacting intermediate (X2-2) with (Y2) in a solvent, such as pyridine or lutidine, at a temperature of 60°C -160°C for 1-12 hours.

Process B2 (R=4-OMe)

The following examples further illustrate the present invention, but should not be construed as in any way to limit its scope.

Example 1

Representation of Process A, Process Al

Process for preparation of l-((4-(4-Fluoro-2 -methyl- lH-indol-5-yloxy)-6-methoxy- quinolin-7-yloxy)methyl)cyclopropanamine (AL3818)

To a stirred mixture of benzyl l-(hydroxymethyl)cyclopropylcarbamate (50 g) and DCM (200 ml) was added DIPEA (39g). The result solution was cooled to 0-5 °C with ice/water and further stirred under this temperature for 15 min. MsCl (30g) was added via an addition funnel dropwise keeping temperature below 5°C for about 1.5 hours. After completion of addition, the reaction mixture was allowed stirring at 0-5°C for 30 min and quenched with saturated NaHC0₃ (150 ml). The solution was extracted with 150 ml DCM twice. The combined DCM layer was washed with 0.1 N HCl (400 ml) followed by brine. It was dried over Na₂S0₄ and concentrated to obtain an off-white solid 60 gram as (l-(benzyloxycarbonylamino)cyclopropyl)methyl methanesulfonate (Yl-1), MS: (M+l) 300.

To a stirred mixture of (Yl-1) (16 g), XI [(4-(4-fluoro-2-methyl-lH-indol-5-yloxy)-6- methoxy-7-hydroxyquinoline, 12 g] , K₂CO₃ (21 g) and KI (21 g) was added DMF (100 ml), the reaction suspension was heated at 80°C for 10 hours and (Yl-l) (10 g) was added to continuously heated 80°C for 10 hours. The reaction then was quenched with water (150 ml) and extracted with 150 ml DCM twice. The combined DCM layer was washed with 2 N NaOH (100 ml) followed by water and brine. It was dried over Na₂SC>4 and concentrated, further recrystallized from EtOH to obtain a yellow solid as benzyl l-((4-(4-fluoro-2-methyl-lH-indol-5-yloxy)-6-methoxyquinolin- 7-yloxy)methyl)cyclopropylcarbamate (Z-l) 9.5 g. MS: (M+l) 542.

To a stirred mixture of (Z-l) (9.5 g), HCOONH₄ (4.7 g) and Pd/C (10%, wet 50%, 4.7g) was added MeOH, the reaction mixture was heated at 45°C for 1.5 hours. It was then cooled and filtered through Celite, further evaporated. 2N HCl (200 ml) was added and extracted with DCM/MeOH (10/1, 100 ml) twice. The aqueous layer was basified with 3N NaOH to adjust pH 11-12 to generate a solid precipitation. The solid was filtered and washed with water to neutral, further suction dry. The solid was dissolved into a mixture of DCM/MeOH (250 ml, 10/1) and further washed with water and brine. It was dried with MgS0₄ and filtered, further evaporated to give a light yellow solid 5.5 g crude product. Further purification was conducted by dissolving the crude product into DCM/MeOH (40 ml, 10/1) to triturate with petroleum ether (40 ml) for 2 hours slow stirring. The precipitate was filtered and dried in an oven to give the final crystalline product 4.4 g (MP: 203-208 C) and it can be further purified by recrystallizing from EtOH to give purer final product as a same crystalline form. MS: (M+l) 408; ¾ NMR(DMSO-dg) δ 0.60- 0.63(d, 4H), 2.41(s, 1H), 2.42-2.5 l(t, 2H), 3.3 l(s, 2H), 3.96(s, 3H), 4.04(s, 2H), 6.27(s, 1H), 6.31-6.32(m, 1H), 6.97-7.02(t, 1H), 7.20-7.22(d, 1H), 7.36(s, 1H), 7.60(s, 1H), 8.40-8.42(d, 1H), 1 1.41(s, 1H). MP: 208-210°C; DSC Melting Range (Endo): 207-220°C with Peak Temp=216°CPATENTWO 2019154273https://patentscope.wipo.int/search/en/detail.jsf;jsessionid=11C1DF5485B11ADA40E45C9488AB5679.wapp1nB?docId=WO2019154273&tab=FULLTEXT
Tyrosine kinases are a group of enzymes that catalyze the phosphorylation of protein tyrosine residues. They play an important role in intracellular signal transduction. They are involved in the regulation, signal transmission and development of normal cells, and are also related to tumor cells. Proliferation, differentiation, migration and apoptosis are closely related. Many receptor tyrosine kinases are related to the formation of tumors, and can be divided into epidermal growth factor receptor (EGFR), platelet-derived growth factor receptor (PDGFR), and vascular endothelial cell growth factor receptor according to the structure of their extracellular region. Body (VEGFR), Fibroblast Growth Factor Receptor (FGFR), etc.[0003]WO2008112407 discloses the compound 1-((4-(4-fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy in Example 24 )Methyl)cyclopropylamine and its preparation method, its structural formula is shown in formula I:[0004]

[0005]It is a multi-target receptor tyrosine kinase inhibitor that can inhibit the activity of vascular endothelial cell growth factor receptors (VEGFR1, VEGFR2/KDR and VEGFR3), stem cell factor receptors, platelet-derived growth factor receptors and other kinase activities. Inhibit the downstream signal transduction mediated by VEGFR2, thereby inhibiting tumor angiogenesis.[0006]Solid drugs generally have multiple crystal forms, such as polymorphs, solvates (hydrates), salts, and co-crystals. The change in the crystal form of the same drug usually results in different melting points, solubility, stability, biological activity, etc., which are important factors that affect the difficulty of drug preparation, storage stability, preparation difficulty, and bioavailability. . When the compound has multiple crystal forms, due to the specific thermodynamic properties and stability of the specific crystal form of the drug, it is important to understand the crystal form of the compound used in each dosage form during the preparation process to ensure the production process Use the same form of medicine. Therefore, it is necessary to ensure that the compound is a single crystal form or a known mixture of some crystal forms.[0007]WO2016179123 discloses the crystalline form 1 of the free base anhydrate of the compound of formula I and a preparation method thereof. CN201010245688.1 discloses the anhydrate and dihydrate crystals of quinoline derivative dihydrochloride and the preparation method thereof.[0008]The discovery of a variety of new crystal forms of medicinal compounds provides an opportunity to improve the physical properties of the drug, that is, to expand all the properties of the substance, which can better guide the research of the compound and its preparation. Therefore, the quinoline derivative provided in this application The crystals and pharmaceutical compositions containing the crystals have commercial value in the manufacture of medicines and other applications.Example 1 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropylamine (Formula I compound) preparation[0081]

[0082]Put intermediate 1 (its chemical name is (1-((4-(4-fluoro-2-methyl-1H-indol-5-yl)oxy-6-methoxy Quinolin-7-yl)oxy)methyl)cyclopropyl)benzyl carbamate) 100g, 10% palladium on carbon 30g, ammonium formate 50g and methanol 800ml. Incubate the reaction at 45-55°C, TLC tracking showed that the reaction was complete, filtered, the filter cake was washed with a small amount of methanol, the filtrate was concentrated to dryness under reduced pressure, ethyl acetate and 2mol/L hydrochloric acid were added, stirred for 10 minutes, and then stood for 10 minutes. Separate the aqueous phase, adjust the pH to above 12 with 4N sodium hydroxide, and a large amount of solids will precipitate out. After washing with water until neutral, the aqueous phase is filtered to obtain the crude product of the title compound.[0083]Example 2 Preparation of amorphous compound of formula I[0084]According to the preparation method disclosed in Example 24 of WO2008112407, 1-((4-(4-fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yl (Oxy)methyl)cyclopropylamine is composed of (1-(((4-(4-fluoro-2-methyl-1H-indol-5-yl)oxy-6-methoxyquinolin-7-yl )Oxy)methyl)cyclopropyl)benzyl carbamate (Intermediate 1) was prepared according to the following methods 2.1 and 2.2.[0085]2.1 Take 100 mg of Intermediate 1 and Pd/C (10%, 40 mg) into ethanol (20 ml), and hydrogenate at 50 psi for 12 hours. The reaction solution was filtered with diatomaceous earth, and evaporated to obtain an amorphous compound of formula I, and its X-ray powder diffraction (XRD) pattern was obtained as shown in FIG. 11.[0086] 
2.2 Take 100 mg of Intermediate 1, acetic acid (1ml) and 33% hydrobromic acid/acetic acid (1ml) and mix. The reaction was stirred for 1 hour at room temperature, diluted with ethyl acetate/water, and then basified with sodium carbonate. The organic layer is dried, concentrated, and purified by silica gel column to obtain the amorphous compound of formula I.PATENTUS 20160326138https://patents.google.com/patent/US20160326138A1/enNew process has been outlined in Scheme I.

• The present invention relates a new process to synthesize 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropanamine (AL3818) by condensing intermediate (X1) with (Y1) in a solvent at the presence of KI or NaI to form intermediate (Z) which is deprotected to give the final compound (AL3818) according to Process A.
• [0040]
  The final compound (AL3818) was prepared according to Process A1 when R is H by deprotecting intermediate (Z-1) with HCOONH₄ (ammonium formate) and Pd/C in an alcoholic solvent, such as MeOH, at 25° C.-80° C. for 0.1-4 hours. (Z-1) was prepared by reacting intermediate (X1) with (Y1-1) at the presence of KI or NaI with K₂CO₃ in a solvent, such as acetone or DMF, at a temperature of 60° C.-160° C. for 2-24 hours.
• [0041]
  The final compound (AL3818) was prepared according to Process A2 when R is 4-OMe by deprotecting intermediate (Z-2) with TFA in DCM at 0° C.-30° C. for 1-24 hours. (Z-2) was prepared by reacting intermediate (X1) with (Y1-2) at the presence of KI or NaI with K₂CO₃ in a solvent, such as acetone or DMF, at a temperature of 60° C.-160° C. for 2-24 hours.
• [0042]
  The present invention relates a new process to synthesize 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropanamine (AL3818) by reacting intermediate (X2) with (Y2) in a solvent to form intermediate (Z) which is deprotected to give the final compound (AL3818) according to Process B.
• [0043]
  The final compound (AL3818) was prepared according to Process B1 when R is H by deprotecting intermediate (Z-1) with HCOONH₄ (ammonium formate) and Pd/C in an alcoholic solvent, such as MeOH, at 25° C.-80° C. for 0.1-4 hours. (Z-1) was prepared by reacting intermediate (X2-1) with (Y2) in a solvent, such as pyridine or lutidine, at a temperature of 60° C.-160° C. for 1-12 hours.
• [0044]
  The final compound (AL3818) was prepared according to Process B2 when R is 4-OMe by deprotecting intermediate (Z-2) with TFA in DCM at 0° C.-30° C. for 1-24 hours. (Z-2) was prepared by reacting intermediate (X2-2) with (Y2) in a solvent, such as pyridine or lutidine, at a temperature of 60° C.-160° C. for 1-12 hours.
• [0045]
  The following examples further illustrate the present invention, but should not be construed as in any way to limit its scope.

Example 1Representation of Process A, Process A1Process for preparation of 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxy-quinolin-7-yloxy)methyl)cyclopropanamine (AL3818)

• [0046]
  To a stirred mixture of benzyl 1-(hydroxymethyl)cyclopropylcarbamate (50 g) and DCM (200 ml) was added DIPEA (39 g). The result solution was cooled to 0-5° C. with ice/water and further stirred under this temperature for 15 min. MsCl (30 g) was added via an addition funnel dropwise keeping temperature below 5° C. for about 1.5 hours. After completion of addition, the reaction mixture was allowed stirring at 0-5° C. for 30 min and quenched with saturated NaHCO₃ (150 ml). The solution was extracted with 150 ml DCM twice. The combined DCM layer was washed with 0.1 N HCl (400 ml) followed by brine. It was dried over Na₂SO₄ and concentrated to obtain an off-white solid 60 gram as (1-(benzyloxycarbonylamino)cyclopropyl)methyl methanesulfonate (Y1-1), MS: (M+1) 300.
• [0047]
  To a stirred mixture of (Y1-1) (16 g), X1 [(4-(4-fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxy-7-hydroxyquinoline, 12 g], K₂CO₃ (21 g) and KI (21 g) was added DMF (100 ml), the reaction suspension was heated at 80° C. for 10 hours and (Y1-1) (10 g) was added to continuously heated 80° C. for 10 hours. The reaction then was quenched with water (150 ml) and extracted with 150 ml DCM twice. The combined DCM layer was washed with 2 N NaOH (100 ml) followed by water and brine. It was dried over Na₂SO₄ and concentrated, further recrystallized from EtOH to obtain a yellow solid as benzyl 1-((4-(4-fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy)methyl)cyclopropylcarbamate (Z-1) 9.5 g. MS: (M+1) 542.
• [0048]
  To a stirred mixture of (Z-1) (9.5 g), HCOONH₄ (4.7 g) and Pd/C (10%, wet 50%, 4.7 g) was added MeOH, the reaction mixture was heated at 45° C. for 1.5 hours. It was then cooled and filtered through Celite, further evaporated. 2N HCl (200 ml) was added and extracted with DCM/MeOH (10/1, 100 ml) twice. The aqueous layer was basified with 3N NaOH to adjust pH 11-12 to generate a solid precipitation. The solid was filtered and washed with water to neutral, further suction dry. The solid was dissolved into a mixture of DCM/MeOH (250 ml, 10/1) and further washed with water and brine. It was dried with MgSO₄ and filtered, further evaporated to give a light yellow solid 5.5 g crude product. Further purification was conducted by dissolving the crude product into DCM/MeOH (40 ml, 10/1) to triturate with petroleum ether (40 ml) for 2 hours slow stirring. The precipitate was filtered and dried in an oven to give the final crystalline product 4.4 g (MP: 203-208° C.) and it can be further purified by recrystallizing from EtOH to give purer final product as a same crystalline form. MS: (M+1) 408; ¹H NMR (DMSO-d₆) δ 0.60-0.63 (d, 4H), 2.41 (s, 1H), 2.42-2.51 (t, 2H), 3.31 (s, 2H), 3.96 (s, 3H), 4.04 (s, 2H), 6.27 (s, 1H), 6.31-6.32 (m, 1H), 6.97-7.02 (t, 1H), 7.20-7.22 (d, 1H), 7.36 (s, 1H), 7.60 (s, 1H), 8.40-8.42 (d, 1H), 11.41 (s, 1H). MP: 208-210° C.; DSC Melting Range (Endo): 207-220° C. with Peak Temp=216° C. TGA demonstrating as an unsolvated material with weight loss at about 210° C. (between 205-215° C.). XRPD having pattern comprising characteristic 10 peaks with intensity % greater than 10% expressed in d values and angles as follows:
• Angle d value 13.344 6.62986 15.858 5.58405 16.799 5.27326 17.640 5.02377 18.770 4.72373 20.650 4.29771 21.633 4.10463 23.087 3.84934 25.128 3.54112 26.607 3.34755

• [0049]
  It was similar prepared according to the preparation procedures of (Z-1) described in Example 1 by using 4-methoxybenzyl 1-(hydroxymethyl)cyclopropylcarbamate to first generate (1-((4-methoxybenzyloxy)carbonylamino)cyclopropyl)methyl methanesulfonate (Y1-2) then to give 4-methoxybenzyl 1-((4-(4-fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxyquinolin-7-yloxy)-methyl)cyclopropylcarbamate (Z-2), MS: (M+1) 572
• [0050]
  To a stirred mixture of (Z-2) (1.5 g) in DCM (15 ml) at 0° C. was added TFA (1.5 ml) for about 30 min and warmed up to RT. The reaction was stirred at RT for 2 hours and added into water (30 ml). The aqueous layer was extracted with DCM twice (100 ml×2) and basified with 2N NaOH to adjust pH 11-12. The mixture was extracted with DCM (100 ml×3) and further washed with brine (100 ml). It was dried with MgSO₄ and filtered. The solution was evaporated to give 1.05 g crude final product. Further purification was conducted to dissolve the crude product into DCM/MeOH and triturated with petroleum ether and dried in an oven to give the final pure product 0.8 g AL3818 with the same crystalline form.

Example 3Representation of Process A, Process B1Process for preparation of 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxy-quinolin-7-yloxy)methyl)cyclopropanamine (AL3818)

• [0051]
  To a mixture of benzyl 1-((4-chloro-6-methoxyquinolin-7-yloxy)methyl)cyclopropyl-carbamate (X2-1) (5 g), 4-fluoro-2-methyl-1H-indol-5-ol (Y2) (5 g) and DMAP (4 g) was added 1,6-lutidine (15 ml). The reaction was stirred and heated at 135° C. for 5 hours and was cooled followed by adding IPA with slow stirring for 2 hours at RT. The solid was filtered and further washed with IPA, dried to give (Z-1) 5.2 g as a solid. It was then similarly prepared according to deprotection procedures described of (Z-1) in Example 1 to give the final compound AL3818 with the same crystalline form.

Example 4Representation of Process A, Process B2Process for preparation of 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxy-quinolin-7-yloxy)methyl)cyclopropanamine (AL3818)

• [0052]
  (Z-2) was similarly prepared according to the procedures described in Example 3 by using 4-methoxybenzyl 1-((4-chloro-6-methoxyquinolin-7-yloxy)methyl)cyclopropylcarbamate (X2-2) and (Y2). It was then similarly prepared according to deprotection procedures of (Z-2) described in Example 2 to give the final compound AL3818 with the same crystalline form.

Example 5

• [0053]
  Preparation of 1-((4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)-6-methoxy-quinolin-7-yloxy)-methyl)cyclopropanamine bishydrochloride acid salt and its crystalline
• [0054]
  To a 25 ml flask was added 250 mg free base (AL3818), 4N HCl in dioxane 0.625 mL (2.5 mmol, 4 eq.) in 10 ml EtOH, the reaction was heated at 75° C. for 30 minutes, cooled to RT and stirred for O.N. The solid was filtered and rinsed with acetone twice. It was dried in oven at 50° C. for 4 hours to give 126 mg white solid as the bishydrochloride salt as a crystalline and further recrystallized from EtOH to give a purer product as a same crystalline form. ¹H NMR (DMSO-d₆) δ 1.09-1.24 (m, 4H), 2.43 (s, 3H), 4.08 (s, 3H), 4.40 (s, 2H), 6.32 (s, 1H), 6.76 (s, 1H), 7.05-7.11 (t, 1H), 7.27-7.30 (d, 1H), 7.65 (s, 1H), 7.82 (s, 1H), 8.64 (s, 2H), 8.70-8.73 (m, 1H), 11.51 (s, 1H). Chloride ion chromatography showed 2 molecular ratio ions (16.1%). DSC Melting Range (Exo): 249-280 with Peak Temp=268° C.
• [0055]
  To a 10 mL flask, charged 140 mg of 3818-2HCl salt from above Example 4 and 0.7 mL (×5 with salt volume) of 80% MeOH in H₂O. The result suspension was heated to 70° C. to form a solution and cooled to RT and further stirred for O.N. The solid was filtered and rinsed with acetone twice. It was dried in oven at 50° C. for 4 hours to obtain off-white solid 110 mg as the crystalline bishydrochloride hydrate salt. ¹H NMR (DMSO-d₆) δ 1.09 (s, 2H), 1.22 (s, 2H), 2.44 (s, 1H), 2.52 (s, 2H), 4.09 (s, 3H), 4.44 (s, 2H), 6.32 (s, 1H), 6.81-6.82 (d, 1H), 7.08-7.14 (t, 1H), 7.29-7.32 (d, 1H), 7.79 (s, 1H), 7.85 (s, 1H), 8.75-8.78 (d, 1H), 8.85 (s, 2H), 11.66 (s. 1H). Chloride ion chromatography showed 2 molecular ratio ions (17.8%). DSC Melting Range (Exo): 207-260° C. with Peak Temp=226° C. TGA demonstrating 2.68% (˜3%, 1 water) weight loss till 120° C. (between 115-125° C.) and further weight loss at about 170° C. (between 165-175° C.).

PATENT

US8148532B2.

https://patents.google.com/patent/US8148532B2/en

Patent

2. US20080227811A1.

/////////////catequentinib, ANLOTINIB, AL3818, AL 3818, PHASE 2, CHINA 2018

NC1(CC1)COc1cc2nccc(Oc3ccc4[NH]c(C)cc4c3F)c2cc1OC