Acylation of Hydrazides with Acetic Acid and Formic Acid.
作者:Keiko Hojo、Mitsuko Maeda、Timothy J. Smith、Koichi Kawasaki
DOI:10.1248/cpb.50.140
日期:——
important intermediates for the azide coupling method. A hydrazide is converted to the corresponding azide in the presence of an acid and a nitrite. When acetic acid (or formic acid) is used as the acid, partial acetylation (or formylation) of the hydrazide occurs as a side reaction. Formylation of the hydrazide is much faster than acetylation. Removal of the formyl group on the hydrazide with hydrazine