Aryne 1,2,3,5-Tetrasubstitution Enabled by 3-Silylaryne and Allyl Sulfoxide via an Aromatic 1,3-Silyl Migration
作者:Jiarong Shi、Lianggui Li、Chunhui Shan、Junli Wang、Zhonghong Chen、Rongrong Gu、Jia He、Min Tan、Yu Lan、Yang Li
DOI:10.1021/jacs.0c11119
日期:2021.2.10
2-difunctionalized benzenes, the sites other than its formal triple bond remain silent in typical benzyne transformations. An unprecedented aryne 1,2,3,5-tetrasubstitution was realized from 3-silylbenzyne and aryl allyl sulfoxide, the mechanistic pathway of which includes a regioselective aryne insertion into the S═O bond, a [3,6]-sigmatropic rearrangement, and a thermal aromatic 1,3-silyl migration cascade.
尽管众所周知,苯并炔可以方便地制备各种1,2-双官能化苯,但是在典型的苯并炔转化中,除其正式的三键外,其他部位均保持沉默。通过3-甲硅烷基苯并亚甲基和芳基烯丙基亚砜实现了前所未有的芳基1,2,3,5-四取代,其机理包括将区域选择性芳烃插入S═O键,[3,6]-σ重排,和一个芳香族的1,3-甲硅烷基迁移级联反应。