Are there concentration effects in enantioselective deprotonation of cyclic ketones?
作者:Marek Majewski、Fan Wang
DOI:10.1016/s0040-4020(02)00363-0
日期:2002.6
Deprotonation of tropinone and its sulfur analog (8-thiabicyclo[3.2.1]octan-3-one, TBON) with chiral lithium amides (e.g. lithium N-benzyl-alpha-methylbenzylamide), followed by addition of the resulting enolates to benzaldehyde, affords non-racemic products, the enantiomeric excess of which depends on the concentration of the lithium amide. (C) 2002 Elsevier Science Ltd. All rights reserved.