2-[(e)-2-Amino-1-eth-(e)-ylidene-but-2-enylsulfanyl]-5-fluoro-benzoic acid methyl ester → 2-Fluorodibenzo[B,F][1,4]thiazepin-11(10H)-one

Participants

Reaction Steps

Thus, 2-aminobenzenethiol may be reacted with 2,5-difluoro-benzoic acid methyl ester to form a 2-[(E)-2-amino-1-eth-(E)-ylidene-but-2-enylsulfanyl]-5-fluoro-benzoic acid methyl ester intermediate that can be converted by treatment with alkali to 2-[(E)-2-amino-1-eth-(E)-ylidene-but-2-enylsulfanyl]-5-fluoro-benzoic acid. The benzoic acid can be cyclized to form 2-fluoro-10H-dibenzo[b,f][1,4]thiazepin-11-one, that may be converted to 11-chloro-2-fluoro-dibenzo[b,f][1,4]thiazepine, that may be further reacted with piperazine to form the title compound.

Provenance & Evidence