Degenerative xanthate transfer to olefins under visible-light photocatalysis
作者:Atsushi Kaga、Xiangyang Wu、Joel Yi Jie Lim、Hirohito Hayashi、Yunpeng Lu、Edwin K L Yeow、Shunsuke Chiba
DOI:10.3762/bjoc.14.283
日期:——
The degenerative transfer of xanthates to olefins is enabled by the iridium-based photocatalyst [IrdF(CF3)ppy}2(dtbbpy)](PF6) under blue LED light irradiation. Detailed mechanistic investigations through kinetics and photophysical studies revealed that the process operates under a radical chain mechanism, which is initiated through triplet-sensitization of xanthates by the long-lived triplet state
A Convergent Approach to 1,3-Dithiolan-2-ones and an Unexpected Synthesis of Lactones
作者:Xianzhu Zeng、Samir Z. Zard
DOI:10.1021/acs.orglett.2c02215
日期:2022.7.29
reagents, and is atom economical, since both sulfur atoms of the xanthate end up in the products. With adducts derived from xanthates bearing an ester group, an unexpected transformation leading to lactones was uncovered.