Thiophenol-mediated improvement of the Pictet–Spengler cyclization of N-tosyl-β-phenethylamines with aldehydes
作者:Claudio C. Silveira、Adriano S. Vieira、Teodoro S. Kaufman
DOI:10.1016/j.tetlet.2006.08.097
日期:2006.10
The Lewis acid-catalyzed Pictet-Spengler condensation of N-tosyl-beta-phenethylamines with aldehydes is improved by the addition of thiophenol, furnishing better yields of 1-substituted tetrahydroisoquinolines at a given time. (c) 2006 Elsevier Ltd. All rights reserved.
Tungstophosphoric acid catalyzed synthesis of N-sulfonyl-1,2,3,4-tetrahydroisoquinoline analogs
An operationally simple and eco-friendly protocol has been developed for the synthesis of N-sulfonyl-1,2,3,4-tetrahydroisoquinolines 3 using the modified Pictet-Spengler reaction of N-sulfonylphenylethylamines 1 and various aldehydes 2 in the presence of tungstophosphoric acid hydrate. (C) 2013 Ratchanok Pingaew. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
LUKANOV L. K.; VENKOV A. P.; MOLLOV N. M., SYNTHESIS,(1987) N 2, 204-206