Catalyst-free, visible-light-promoted S–H insertion reaction between thiols and α-diazoesters
作者:Jingya Yang、Ganggang Wang、Shuwen Chen、Ben Ma、Hongyan Zhou、Menghui Song、Cai Liu、Congde Huo
DOI:10.1039/d0ob02006k
日期:——
A visible-light-promoted S–H insertion reaction betweenthiols and α-diazoesters was developed. The reaction proceeded smoothly at room temperature with a broad substrate scope, affording various thioethers in moderate to excellent yields. The catalyst- and additive-free nature, sustainable energy source and mild reaction conditions make this strategy more eco-friendly.
Cu(I)/Chiral Bisoxazoline-Catalyzed Enantioselective Sommelet–Hauser Rearrangement of Sulfonium Ylides
作者:Shu-Sen Li、Jianbo Wang
DOI:10.1021/acs.joc.0c01590
日期:2020.10.2
asymmetric thia-Sommelet–Hauser rearrangement of sulfonium ylides remains a great challenge due to its multistep reaction mechanism involving metal carbene formation, proton transfer, and [2,3]-sigmatropic rearrangement. In particular, the key problem of such reactions is the differentiation of the enantiotopic lone pair electrons of sulfur, which generates the sulfonium ylide intermediate bearing chirality
Sulfonium ylide formation and subsequent C S bond cleavage of aromatic isopropyl sulfide catalyzed by hemin in aqueous solvent
作者:Xiaojing Yan、Chang Li、Xiaofei Xu、Quan He、Xiaoyong Zhao、Yuanjiang Pan
DOI:10.1016/j.tet.2019.04.035
日期:2019.6
Heme is an abundant and widely existed cofactor for a variety of metalloenzymes, whose broader use is generally impeded by its high instability and poor solubility. Here we report an environment-benign and efficient strategy for the sulfonium ylide formation and subsequent CS bondcleavage of aromatic isopropyl sulfides, which was catalyzed by hemin in assistance of Triton X-100. This aqueous catalytic
Metal-free blue light-mediated [2,3]-sigmatropic rearrangement reactions of tosylhydrazones and sulfides are reported herein. This strategy shows great enhancement compared to the traditional methods because of stable starting materials and mild reaction conditions. In this report, we have developed the Doyle-Kirmse reaction and Sommelet-Hauser reaction with simple operation, high yields and broad
TBAI-Catalyzed S–H and N–H Insertion Reactions of α-Diazoesters with Thiophenols and Amines under Metal-Free Conditions
作者:Rongxiang Chen、Guoyang Ma、Yawen Li、Jinju Zhang、Ran Xia、Kai-Kai Wang、Lantao Liu
DOI:10.1021/acs.joc.2c01262
日期:2022.8.19
Mild, convenient, and effective TBAI-catalyzed S–H and N–H insertion reactions of α-diazoesters with thiophenols and aromatic aminesunder metal-free conditions have been described, furnishing a straightforward and general platform for the synthesis of various thioethers and 2-amino-2-oxoacetates in moderate to excellent yields. Moreover, this strategy features simple operation, mild conditions, broad