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The benzamide (VI) was prepd. 3,4-R(MeO) C6H3 SO2NH2(I; R =COOH) was treated with PC15-NH4OH to give 94% I(R =CN) (II). Reaction of II with MeOH gave 54% I[R = CC;NH)OMe (III).III was treated with H2S to give 73% I(R CSOMe) (IV). Grignard reaction of IV with 2-[dibromoamino)methyl -1-ethyl-pyrrolidine gave 34% thiobenzamide(V). V was treated with (AcO)4Pb to give 75% VI.
KR7401674A1974-02-281974-02-28Method of preparing n-(1-ethyl 2-pyrrolidyl-methyl)2-methoxy 5-sulphamidobenzamide
KR790000047B1
(en)