Dimethylformamide → 4,9-Dihydro-9-methyl-10H-thieno[3,4-b][1,5]benzodiazepin-10-one

Participants

Reaction Steps

To a stirred mixture of 0.84 g. of 4,9-dihydro-10H-thieno[3,4-b][1,5]benzodiazepin-10-one and 0.18 g. of 55% sodium hydride-mineral oil dispersion in 25 ml. of dimethylformamide is added 0.3 ml. of methyl iodide. The reaction mixture is stirred for 2.5 hours, cooled, diluted with water and filtered. The solid product is recrystallized from methanol-water to give pale yellow crystals, m.p. 195°-198° C.

Provenance & Evidence