Synthesis of 3-cyano-5-ethoxycarbonyl-6-hydroxypyridine-2-thiol derivatives
摘要:
Ethyl ethoxymethylenemalonate reacts with cyanothioacetamide and N-methylmorpholine to give N-methylmorpholinium 3-cyano-5-ethoxycarbonyl-6-oxopyridine-2-thiolate. Alkylation of the latter yields S-alkyl derivatives.