trans-SN2′ reaction in acylolysis of 4β-halogeno-5β-chlolestan-3-ones
Abstract
A new type of SN2′ reaction in which the nucleophile enters trans to the leaving group occurs in the acylolysis of a 4β-halogeno-5β-chloestan-3-one to give a 2β-acyloxy-5β-chloestan-3-one as a product.