Aqueous phosphoric acid as a mild reagent for deprotection of the t-butoxycarbonyl group
作者:Bryan Li、Raymond Bemish、Richard A. Buzon、Charles K.-F. Chiu、Stephen T. Colgan、William Kissel、Tung Le、Kyle R. Leeman、Lisa Newell、Joshua Roth
DOI:10.1016/j.tetlet.2003.09.040
日期:2003.10
Aqueous phosphoric acid (85 wt%) is an efficient and mild reagent for the deprotection of N-BOC groups. Acid sensitive functionalities including benzyl and methyl esters, TBDMS ether, CBZ and isopropylidene groups are compatible with the reaction conditions. The reactions are high yielding, and the workup is convenient. (C) 2003 Elsevier Ltd. All rights reserved.