Synthesis of Highly Functionalized Allylic Alcohols from Vinyl Oxiranes and <i>N</i>-Tosylhydrazones via a Tsuji–Trost-Like “Palladium–Iodide” Catalyzed Coupling
作者:Stefano Parisotto、Annamaria Deagostino
DOI:10.1021/acs.orglett.8b03026
日期:2018.11.2
An unprecedented efficient palladium(0)-catalyzed reaction of vinyl oxiranes with N-tosylhydrazones, affording “skipped” allylic alcohols in total regioselectivity and stereoselectivity, with excellent functional-group compatibility, is reported. In this Tsuji–Trost-like allylation, we propose the use of N-tosylhydrazones as a synthetic equivalent of α-styryl anions. More than 20 new products are described
据报道,前所未有的有效的钯(0)催化的乙烯基氧杂环戊烷与N-甲苯磺酰hydr的反应,提供了“跳过”的烯丙基醇,具有总的区域选择性和立体选择性,并具有出色的官能团相容性。在这种类似Tsuji–Trost的烯丙基化反应中,我们建议使用N-甲苯磺酰hydr作为α-苯乙烯基阴离子的合成等价物。描述了20多种新产品,包括天然衍生物。涉及碘化物的催化体系(I - )源是必要的,以维持催化循环。