Syntheses of highly constrained β-aryl isohexanoic acid derivatives via asymmetric Michael addition
作者:Subo Liao、Yinglin Han、Wei Qui、Michael Bruck、Victor J. Hruby
DOI:10.1016/0040-4039(96)01795-9
日期:1996.10
A series of enantiomerically pure highly sterically hindered β-branched isohexanoic acid derivatives have been synthesized with high diastereoselectivity via asymmetric Michael addition. The X-ray crystal structure of (4S,3′S)-3-[3′-(2,6-dimethylphenyl)isohexanyl]-4-phenyl-2-oxazolidinone demonstrated that the β-configuration was induced from the Si-face, and that the torsional angle χ2 was restricted
已经通过不对称迈克尔加成以高非对映选择性合成了一系列对映体纯的高空间位阻的β-支化异己酸衍生物。(4S,3′S)-3- [3′-(2,6-二甲基苯基)异己基] -4-苯基-2-恶唑烷酮的X射线晶体结构表明,β-构型是由Si-诱导的。面,并且所述扭转角χ 2由笨重β-异丙基限制为从分子建模预期的范围内。