Synthesis of Enantiomerically Enriched Tertiary 2-Cyclohexene-1-thiols via Configurationally Stable α-Thio-Substituted Allyllithium Compounds
作者:Felix Marr、Dieter Hoppe
DOI:10.1021/ol0266828
日期:2002.11.1
[reaction: see text] (S)-S-(2-Cyclohexenyl) N,N-diisopropylmonothiocarbamate [(-)-(S)-8] was deprotonated by sec-butyllithium/TMEDA to form a configurationally stable lithium compound (S)-9, which is the first example of a new class of alpha-thio-substituted organolithium compounds with improved properties. It is regioselectively alkylated by alkyl halides with complete stereoinversion to form the
[反应:参见正文]通过仲丁基锂/ TMEDA使(S)-S-(2-环己烯基)N,N-二异丙基单硫代氨基甲酸酯[(-)-(S)-8]质子化,形成结构稳定的锂化合物(S )-9,这是具有改进性能的新型一类α-硫基取代的有机锂化合物的第一个例子。通过卤代烷将其区域选择性地烷基化,并具有完全的立体转化,从而形成一硫代氨基甲酸酯(+)-10,该单硫代氨基甲酸酯(+)-10在还原裂解时提供高度对映体富集的叔2-环己烯-1-硫醇(+)-6。