Complete reversal of enantioselection using oxazoline-containing Schiff base ligands derived from l-serine in enantioselective addition of diketene to aldehydes
作者:Changhu Chu、Koji Morishita、Takanori Tanaka、Masahiko Hayashi
DOI:10.1016/j.tetasy.2006.09.026
日期:2006.10
Starting from one stereogenic center (in this case from L-serine), we obtained two chiral Schiff bases possessing oxazoline moieties, each of which recognized a different enantioface of aldehydes with a high enantionteric excess [up to 93% ee (R) and 89% ee (S)] in the addition reaction of diketene to 2-furfural. (c) 2006 Elsevier Ltd. All rights reserved.