One-Pot α-Amidosulfone-Mediated Variation of the Pictet-Spengler Tetrahydroisoquinoline Synthesis, Suitable for Amide-Type Substrates
作者:Francisco J. Arroyo、Pilar López-Alvarado、A. Ganesan、J. Carlos Menéndez
DOI:10.1002/ejoc.201402487
日期:2014.9
development of Pictet–Spengler reactions from amide substrates is a challenging problem. We report here that the reaction between amide-type compounds (including carbamates, amides, ureas and diketopiperazines), aldehydes and p-toluenesulfinic acid constitutes an efficient method for the preparation of tetrahydroisoquinolines or pyrazino[2,1-b]isoquinolines. Unlike previously known methods, this one-pot Pictet–Spengler
从酰胺底物发展 Pictet-Spengler 反应是一个具有挑战性的问题。我们在此报告酰胺类化合物(包括氨基甲酸酯、酰胺、脲和二酮哌嗪)、醛和对甲苯亚磺酸之间的反应构成了制备四氢异喹啉或吡嗪并 [2,1-b] 异喹啉的有效方法。与以前已知的方法不同,这种一锅 Pictet-Spengler 协议避免了对强路易斯或布朗斯台德酸催化剂的需要。