A reversible safety-catch method for the hydrogenolysis of N-benzyl moieties
摘要:
The benzyl groups of beta-hydroxy-N-benzyl sulfonamides are labile toward hydrogenolysis-unlike N-benzyl sulfonamides lacking the beta-hydroxy moiety. We find that N-acyl-N-benzyl sulfonamides undergo hydrogenolysis under very mild conditions. Based upon these observations, we developed a reversible safety-catch method using tert-butoxycarbonyl moieties to activate N-benzyl sulfonamides toward hydrogenolysis. We also explored the utility of the safety-catch activation method for other nitrogen-based functionality such as N-benzyl carboxamides, imides, and related functionality. (C) 2004 Elsevier Ltd. All rights reserved.
A reversible safety-catch method for the hydrogenolysis of N-benzyl moieties
作者:David C. Johnson、Theodore S. Widlanski
DOI:10.1016/j.tetlet.2004.09.118
日期:2004.11
The benzyl groups of beta-hydroxy-N-benzyl sulfonamides are labile toward hydrogenolysis-unlike N-benzyl sulfonamides lacking the beta-hydroxy moiety. We find that N-acyl-N-benzyl sulfonamides undergo hydrogenolysis under very mild conditions. Based upon these observations, we developed a reversible safety-catch method using tert-butoxycarbonyl moieties to activate N-benzyl sulfonamides toward hydrogenolysis. We also explored the utility of the safety-catch activation method for other nitrogen-based functionality such as N-benzyl carboxamides, imides, and related functionality. (C) 2004 Elsevier Ltd. All rights reserved.
Maia, Hernani L. S.; Monteiro, Luis S.; Degerbeck, Fredrik, Journal of the Chemical Society. Perkin transactions II, 1993, # 3, p. 495 - 500
作者:Maia, Hernani L. S.、Monteiro, Luis S.、Degerbeck, Fredrik、Grehn, Leif、Ragnarsson, Ulf