PROCESS FOR PRODUCING 3,7(9)-DIHYDRO-1H-PURINE-2,6-DITHIONE COMPOUND

摘要

A process for producing a compound represented by the formula (Ia) or (Ib), characterized by (1) reacting a compound represented by the formula (IIa) or (IIb) with a compound represented by the formula (III) in a polar solvent or (2) reacting a compound represented by the formula (IIa) or (IIb) with carbon disulfide and a compound represented by R<SUP>4</SUP>OH in a polar solvent in the presence of an inorganic base. [Chemical formula 1] (IIa) (III) (Ia) (IIb) (Ib) (In the formulae, R<SUP>1</SUP> and R<SUP>2</SUP> each independently represents hydrogen, optionally substituted alkyl, or optionally substituted aryl; R<SUP>3</SUP> represents hydrogen, C<SUB>1-10</SUB> alkyl, or alkali metal; R<SUP>4</SUP> represents hydrogen or C<SUB>1-10</SUB> alkyl; and M represents an alkali metal, etc.)