A new type of SN2′ reaction in which the nucleophile enters to the leaving group occurs in the acylolysis of 4β-bromo-3-keto-5β-steroids (1) to give 2α-acyloxy-3-keto-5β-steroids (2) as a product. This reaction pathway was observed by NMR and by tlc.
4β-
溴-3-酮-5β-类
固醇 (1) 酰基解时发生一种新型 SN2′ 反应,其中亲核试剂进入离去基团,得到 2α-酰氧基-3-酮-5β-类
固醇 (2 )作为产品。通过NMR和TLC观察该反应途径。