Continuous-flow catalytic asymmetric hydrogenations: Reaction optimization using FTIR inline analysis
作者:Magnus Rueping、Teerawut Bootwicha、Erli Sugiono
DOI:10.3762/bjoc.8.32
日期:——
The asymmetric organocatalytic hydrogenation of benzoxazines, quinolines, quinoxalines and 3H-indoles in continuous-flow microreactors has been developed. Reaction monitoring was achieved by using an inline ReactIR flow cell, which allows fast and convenient optimization of reaction parameters. The reductions proceeded well, and the desired products were isolated in high yields and with excellent enantioselectivities.
Asymmetric Synthesis of Indolines by Catalytic Enantioselective Reduction of 3<i>H</i>-Indoles
作者:Magnus Rueping、Claus Brinkmann、Andrey P. Antonchick、Iuliana Atodiresei
DOI:10.1021/ol1019234
日期:2010.10.15
A highly enantioselective metal-free reduction of 3H-indoles has been developed. This Brønsted acid catalyzed transfer hydrogenation of indolederivatives with Hantzsch dihydropyridine as the hydrogen source constitutes an efficient method for the synthesis of various optically active indolines with high enantioselectivities.