Synthesis of γ-Lactams via Pd(II)-Catalyzed C(sp<sup>3</sup>)–H Olefination Using a Self-Cleaving Polyfluoroethylsulfinyl Directing Group
作者:Nan-Qi Shao、Yu-Hao Chen、Chen Li、Dong-Hui Wang
DOI:10.1021/acs.orglett.0c00326
日期:2020.9.18
A monodentate directinggroup, 2-chlorotetrafluoroethylsulfinylmide (-NHSOCF2CF2Cl), for inert C(sp3)–H bond activation is reported. This directinggroup shows efficient ability in Pd(II)-catalyzed C(sp3)–H olefination. The desired olefination products undergo subsequent Michael addition and in situ expulsion of the auxiliary to provide the free NH γ-lactam products. Preliminary mechanistic studies