New Amino-protective Reagents for<i>t</i>-Butoxycarbonylation and Benzyloxycarbonylation of Amines and Amino Acids
作者:Sunggak Kim、Jae In Lee、Kyu Yang Yi
DOI:10.1246/bcsj.58.3570
日期:1985.12
New amino-protective reagents for t-butoxycarbonylation and benzyloxycarbonylation of amines and aminoacids have been developed. t-Butyl 2-pyridyl carbonate and t-butyl S-(2-pyridyl) thiocarbonate react cleanly with various amines and aminoacids to afford N-Boc amines and N-Boc aminoacids in high yields. Benzyl 2-pyridyl carbonate and O-benzyl S-(2-pyridyl) thiocarbonate are also found to be very
Oxidative conversion of hydrazides of carboxylic acids to acids, esters and amides using Cu salts was studied. Acids were obtained in high yields by using a catalytic amount of Cu(OAc)2 at room temperature by bubbling oxygen. Hydrazides were converted to esters by the treatment with Cu(OR)Cl or Cu(OR)2 formed in situ from CuCl2 and sodium alkoxide. Amides were obtained in high yields by the oxidation
Chhipa, R. C.; Singh, A.; Mehrotra, R. C., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1989, vol. 28, # 5, p. 396 - 399