In recent years, a number of methods have been reported on N-formylation of amines. Some of the useful formylation reagents are chloral, 7 formic acid-DCC, 8 formic acid-EDCI, 9 formic acid esters, 10 KF-alumina, 11 and other solid-supported reagents, 12 ammonium formate, 13 CDMT. 14 Many of the N-formylation methods have disadvantages such as expensive reagents, formation of side products, thermal instability, and difficult accessibility to ...