Catalytic AgF-Initiated Intramolecular 1,3-Sulfonyl Migration of <i>gem</i>-Difluorovinyl Sulfonates to α,α-Difluoro-β-ketosulfones
作者:Baojian Xiong、Lei Chen、Jie Xu、Haotian Sun、Xiong Li、Yue Li、Zhong Lian
DOI:10.1021/acs.orglett.0c03492
日期:2020.12.4
3-sulfonyl migration of difluorovinyl sulfonates initiated by a catalytic amount of silver fluoride is presented. α,α-Difluoro-β-ketosulfones were successfully prepared in excellent yields. This method features high chemoselectivity, good functional group tolerance, high atom economy, and mild, environmentally benign reaction conditions. Furthermore, mechanistic experiments indicate that this migration proceeds
提出了由催化量的氟化银引发的二氟乙烯基磺酸盐的1,3-磺酰基迁移。成功地以优异的产率成功制备了α,α-二氟-β-酮砜。该方法具有高化学选择性,良好的官能团耐受性,高原子经济性以及温和的环境友好反应条件。此外,机械实验表明这种迁移以分子间途径进行,并且相应的亚磺酸盐是可能的中间体。