内酯(4)在标准条件下与铜酸盐试剂(5)和(6)反应,主要得到分别来自S N '反过程的产物(8)和(12)在相同条件下内酯(15 )通过S N 2模式与铜酸盐试剂(5)和(6)反应,主要分别得到酸(23)和(19)作为主要产物。将化合物(15),(19)和(23)转化为相应的前列腺素A 2类似物(18),(22)和(26)。
S N? reactions on some cyclopentene derivatives employing simple nucleophiles and organocuprate reagents
作者:Christopher B. Chapleo、Mark A. W. Finch、Stanley M. Roberts、Geoffrey T. Woolley、Roger F. Newton、David W. Selby
DOI:10.1039/p19800001847
日期:——
bromide (4) reacts with the same nucleophile to give the products of SN2 and SN2′syn-reactions. The lactones (1), (4), (15), and (16) react with lithium dibutylcuprate in the SN′ anti-fashion predominantly, while the esters (9) and (11) react via the SN′syn-mode preferentially. Mechanisms are presented to explain the substitution patterns observed for the cuprate reactions.