PROCEDEU PENTRU PREPARAREA UNOR DERIVATI AI 4,5,6,7-TETRAHIDROTIENO(2,3-C)PIRIDINEI SAU AI 4,5,6,7-TETRAHIDROTIENO(3,2-C)PIRIDINEI

摘要

This invention relates to thieno-pyridine derivatives having the formula: in which R1 is hydrogen or alkyl having 1-6 carbon atoms; R2 is hydrogen or acetyl or lower alkylcarbamoyl and R3 is methyl, nitrobenzyl, chlorobenzyl, methoxybenzyl, chlorobenzoyl, trimethoxybenzoyl, pyrrolidinoacetyl, p.toluene-sulfonyl, phenylcarbamoyl, phenylthiocarbamoyl, 3-oxo-butyl, lower alkyl-carbamoyloxy, phenethyl, dichloroacetyl, 2-chlorophenoxy-2-methyl-propionyl or chlorophenyl-carbamoyl, and their pharmaceutically acceptable acid addition salts.