Chloroacetic anhydride → (S)-8-chloro-1-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-7-fluoro-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepin-9-one

HRID 1378173Notes

Reaction equation

HRID 1378173 reaction equation
[Cl:1][C:2]1[C:7]2[C:8](=[O:22])[N:9]3[CH2:21][CH2:20][C@H:10]3[C:11]3[N:12]([CH:13]=[N:14][C:15]=3[C:16](=[N:18][OH:19])[NH2:17])[C:6]=2[CH:5]=[CH:4][C:3]=1[F:23].[Cl:24][CH2:25][C:26](OC(=O)CCl)=O>CN(C)C=O>[Cl:1][C:2]1[C:7]2[C:8](=[O:22])[N:9]3[CH2:21][CH2:20][C@H:10]3[C:11]3[N:12]([CH:13]=[N:14][C:15]=3[C:16]3[N:17]=[C:26]([CH2:25][Cl:24])[O:19][N:18]=3)[C:6]=2[CH:5]=[CH:4][C:3]=1[F:23]

Participants

4

Reactant 2

HCID 10946Chloroacetic anhydrideHCID 54002434(S)-8-chloro-7-fluoro-12,12a-dihydro-9-oxo-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepine-1-carboxamidoxime

Product 1

HCID 54490879(S)-8-chloro-1-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-7-fluoro-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepin-9-oneYield 26.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

6.24 g (18.2 mmol) of (S)-8-chloro-7-fluoro-9-oxo-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepine-1-carboxamidoxime were stirred with 3.43 g (20 mmol) of chloroacetic anhydride and 40 ml of N,N-dimethylformamide at room temperature for 60 hours and at 105° for 2.5 hours. By evaporation of the reaction mixture and chromatography of the residue on silica gel while eluting with methylene chloride/methanol 19/1 there were obtained 1.88 g (26%) of (S)-8-chloro-1-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-7-fluoro-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepin-9-one of m.p. 214°-217°.

Workup

  1. customBy evaporation of the reaction mixture and chromatography of the residue on silica gel
  2. washwhile eluting with methylene chloride/methanol 19/1 there

Sources & evidence

ORD record
ord-055616e02dee4c08b6c0965c0dd3c074
Source dataset
uspto-grants-1997_09
Patent number
US05665718

Reaction notes

Loading…