α-amino carbanions. A second generation formamidine for facile deprotonation leading to α-quaternary substitution
作者:Michael A. Gonzalez、A.I. Meyers
DOI:10.1016/s0040-4039(01)80318-x
日期:——
One-step preparation of 1-substituted tetrahydroisoquinolines via the Pictet–Spengler reaction using zeolite catalysts
作者:Adrienn Hegedüs、Zoltán Hell
DOI:10.1016/j.tetlet.2004.09.097
日期:2004.11
A new, environmentally friendly variation of the Pictet-Spengler reaction has been elaborated using a small pore size zeolite. The easily separable and recyclable catalyst provided high conversions and a shorter reaction time than the classical acetic acid or trifluoroacetic acid. (C) 2004 Elsevier Ltd. All rights reserved.