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.
的环戊烯基溴化物(1)和(9)与苯硫酚反应离子小号Ñ '顺式-时尚具有非常高的选择性。溴化物(4)反应以相同的亲核体,得到的产品小号Ñ 2和小号Ñ 2'顺-reactions。内酯(1),(4),(15),和(16)与锂dibutylcuprate在反应小号Ñ '反时尚主要,而酯(9)和(11)反应经由所述小号Ñ '顺模式优先。提出了机制来解释所观察到的铜酸盐反应的取代模式。