Access to chiral tertiary amines via the iridium-catalyzed asymmetric hydrogenation of enamines
作者:Pradeep Cheruku、Tamara L. Church、Anna Trifonova、Thomas Wartmann、Pher G. Andersson
DOI:10.1016/j.tetlet.2008.10.035
日期:2008.12
The asymmetric hydrogenation of N,N-dialkyl and N-alkyl-N-aryl enamines to chiral tertiary amines was studied. All the N,P-ligated iridium complexes investigated were active catalysts for the reaction, but only those with bicycle-supported oxazoline-phosphine ligands gave reasonable stereoinduction. The best catalyst produced a range of chiral tertiary amines in up to 87% ee.
研究了N,N-二烷基和N-烷基-N-芳基烯胺不对称氢化为手性叔胺。研究的所有N,P连接的铱络合物都是该反应的活性催化剂,但是只有那些带有自行车支撑的恶唑啉-膦配体的化合物才能产生合理的立体诱导。最好的催化剂可以产生高达87%ee的一系列手性叔胺。