Stereoselective process for producing dihydro-2,3-benzodiazepine derivatives

摘要

A physical form of (R)-7-acetyl-5-(4-aminophenyl)-8,9-dihydro-8-methyl-7H-1,3-dioxolo[4,5-h][2,3]benzodiazepine having an X-ray powder diffraction pattern with d spacings at 12.78, 9.48, 8.99, 8.64, 8.23, 6.39, 6.27. 5.73, 4.01 and 3.96 Å. The compound is useful as an AMPA antagonist.