T. Kitagawa et al., CONVENIENT ONE-POT METHOD FOR FORMYLATION OF AMINES AND ALCOHOLS USING FORMIC-ACID AND 1,1'-OXALYLDIIMIDAZOLE, Chemical and Pharmaceutical Bulletin, 42(8), 1994, pp. 1655-1657
1,1'-Oxalyldiimidazole (7) reacts with formic acid (8) in acetonitrile
at room temperature to give N-formylimidazole (5), which promptly und
ergoes aminolysis and alcoholysis to yield formamides (2) or formates
(4).