The asymmetric Horner-Emmons reaction using a benzopyrano-isoxazolidine auxiliary
作者:Atsushi Abiko、Satoru Masamune
DOI:10.1016/0040-4039(95)02352-6
日期:1996.2
The asymmetric Horner-Emmons reaction of the phosphonate derived from a chiral benzopyrano-isoxazolidine (with 4-substituted cyclohexanones) proceeded in high diastereoselectivity with the aid of KHMDS and 18-crown-6 ether. Enantiomerically pure, axially dissymmetric cyclohexylidene alcohols, aldehydes and ketones were obtained from the diastereomerically pure Horner-Emmons products in a single step
借助于KHMDS和18-冠-6醚,衍生自手性苯并吡喃基-异恶唑烷(具有4-取代的环己酮)的膦酸酯的不对称Horner-Emmons反应以高非对映选择性进行。对映体纯的,轴向不对称的环己叉基醇,醛和酮可以一步一步从非对映体纯的Horner-Emmons产品中获得。