Synthesis of novel 6-methyl-4-sulfanylfuro[3,4- с ]pyridin-3(1 H )-ones

Alkylation of 6-methyl-4-thioxo-4,5-dihydrofuro[3,4-c]pyridin-3(1H)-one in an alkaline medium proceeds regioselectively at the sulfur atom to form sulfanyl derivatives.