General and Efficient Organocatalytic Synthesis of Indoloquinolizidines, Pyridoquinazolines and Quinazolinones through a One-Pot Domino Michael Addition-Cyclization- Pictet-Spengler or 1,2-Amine Addition Reaction
作者:Magnus Rueping、Chandra M. R. Volla、Michael Bolte、Gerhard Raabe
DOI:10.1002/adsc.201100258
日期:2011.10
organocatalyzed reaction sequence involving a Michael addition of various 1,3-dicarbonyl compounds to α,β-unsaturated aldehydes with subsequent diastereoselective Pictet–Spengler cyclization has been developed. The substrate scope was found to be general and optically active indoloquinolizidines were isolated as single diastereomers in high yields with high to excellent enantioselectivites. In addition to tryptamine
已经开发出一种不对称的有机催化反应序列,该反应序列包括将各种1,3-二羰基化合物迈克尔加成到α,β-不饱和醛上,以及随后的非对映选择性Pictet-Spengler环化反应。发现底物的范围是一般的,并且光学活性的吲哚并喹喔啉类作为单一非对映异构体以高收率和高至优异的对映体选择性被分离出来。除色胺外,该反应还已成功地应用于其他亲核试剂,包括邻氨基苄胺和邻氨基苯甲酰胺,产生了吡啶并喹啉和喹唑啉酮。