Selurampanel, BGG 492

Selurampanel, BGG492, 

cas 912574-69-7

Chemical Formula: C16H19N5O4S
Exact Mass: 377.1158

UNII-7WG1MR7DAR;

N-(7-isopropyl-6-(1-methyl-1H-pyrazol-5-yl)-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl)methanesulfonamide

N-[7-Isopropyl-6-(1-methyl-1H-pyrazol-5-yl)-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-3-yl]methanesulfonamide

PHASE 2 , FOR EPILEPSY, TITINUS

NOVARTIS INNOVATOR

Selurampanel (INN, code name BGG492) is a drug closely related to the quinoxalinedione series which acts as a competitive antagonist of the AMPA and kainate receptors and, as of 2015, is being investigated in clinical trials by Novartis for the treatment ofepilepsy.^[1][2][3] It has also been studied in the acute treatment of migraine, and was found to produce some pain relief, but with a relatively high rate of side effects.^[4]

PATENT

https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2006108591&recNum=1&maxRec=&office=&prevFilter=&sortOption=&queryString=&tab=PCTDescription

Example 44: N-[7-IsopropyI-6-(l-methyl-lH-pyrazol-4-yl)-2,4-dioxo-l,4-dihydro-2H-quinazoIin-3-yl]-methanesulfonamide
2-Amino-4-isopropyl-5-(2-methyl-2H-pyrazol-3-yl)-benzoic acid methyl ester

The 2-amino-5-iodo-4-isopropyl-benzoic acid methyl ester required for the coupling reaction described below was prepared according to the procedures described in WO 2004/033435 Al.

The l-methyl-5-tributylstannanyl-lH-pyrazole required for the coupling reaction was prepared according to the procedure described above.

2-Amino-5-iodo-4-isopropyl-benzoic acid methyl ester (300 mg, 0.94 mmol) and l-methyl-5-tributylstannanyl-lH-pyrazole (523 mg, 1.5 equiv) were weighed in air and added in a flame-dried flask. [Bistriphenylphosphine]dichloropalladium (67.3 mg, 0.1 equiv) was added and the flask was closed by a septum. Dioxane (1 mL) was added and the mixture was stirred for 18 h (TLC control) at 100 ⁰C. The mixture was dissolved with EtOAc, filtered and evaporated to dryness. The crude product was purified by flash chromatography (hexanes to EtOAc / hexanes (4:6)) to yield 2-amino-4-isopropyl-5-(2-methyl-2H- pyrazol-3-yl)-benzoic acid methyl ester (169 mg, 66%) as a yellow solid. (ESI-MS: m/z 21 A [M+H]⁺, rt 5.20 min).

2-(4-Chloro-phenoxycarbonylamino)-4-isopropyl-5-(2-methyl-2H-pyrazol-3-yl)-benzoic acid methyl ester

4-Chlorophenyl-chloroformate (88 μL, 1.1 equiv) was added to a solution of 2-amino-4-isopropyl-5-(2~ methyl-2H-pyrazol-3-yl)-benzoic acid methyl ester (156 mg, 0.57 mmol) in dioxane (1.5 mL). The mixture was stirred for 2 h (TLC control) at 80 ⁰C. The mixture was evaporated to dryness. The obtained yellow solid was used in the next step without further purification, (rt 6.77 min)

N-[7-Isopropyl-6-(2-methyl-2H-pyrazol-3 -yl)-2,4-dioxo- 1 ,4-dihydro-2H-quinazolin-3 -yl] -methanesulfonamide

CH₃SO₂NHNH₂ (79.5 mg, 1.1 equiv) and J-Pr₂NEt (225 μL, 2 equiv) were added to a solution of 2-(4-chloro-phenoxycarbonylamino)-4-isopropyl-5-(2-methyl-2H-pyrazol-3-yl)-benzoic acid methyl ester (281 mg, 0.65 mmol) in dioxane (8 mL). The mixture was stirred for 16 h (TLC control) at 80 ⁰C. The mixture was evaporated to dryness. The crude product was purified by flash chromatography (MeOH / DCM (1:9)) to provide N-[7-isopropyl-6-(2-methyl-2H-pyrazol-3 ~yl)-2,4-dioxo- 1 ,4-dihydro-2H-quinazolin-3 -yl]-methanesulfonamide as a white solid (120 mg, 48%) (ESI-MS: m/z 378 [M+H]⁺, rt 4.20 min).

References

Selurampanel

Systematic (IUPAC) name
N-[7-Isopropyl-6-(2-methylpyrazol-3-yl)-2,4-dioxo-1H-quinazolin-3-yl]methanesulfonamide
Identifiers
CAS Number	912574-69-7
ATC code	None
PubChem	CID 45381907
ChemSpider	32698379
Chemical data
Formula	C16H19N5O4S
Molar mass	377.418 g/mol

see……..http://apisynthesisint.blogspot.in/2016/02/selurampanel-bgg-492.html

////Selurampanel, BGG492, 912574-69-7

CC(C)c1cc2c(cc1c3ccnn3C)c(=O)n(c(=O)[nH]2)NS(=O)(=O)C

CS(=O)(NN1C(NC2=C(C=C(C3=CC=NN3C)C(C(C)C)=C2)C1=O)=O)=O