Iron-catalyzed aerobic difunctionalization of alkenes: a highly efficient approach to construct oxindoles by C–S and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Song Song、Ning Jiao
DOI:10.1039/c4cc00401a
日期:——
A novel iron-catalyzed efficient approach to construct sulfone-containing oxindoles, which play important roles in the structural library design and drug discovery, has been developed. The use of readily available benzenesulfinic acids, an inexpensive iron salt as the catalyst, and air as the oxidant makes this sulfur incorporation protocol very efficient and practical.
Metal Free Benzylation and Alkylation of Quinoxalin‐2(1
<i>H</i>
)‐ones with Alkenes Triggered by Sulfonyl Radical Generated from Sulfinic Acids
作者:Himangsu Sekhar Dutta、Ashfaq Ahmad、Afsar Ali Khan、Mohit Kumar、Raziullah、Dipankar Koley
DOI:10.1002/adsc.201901212
日期:2019.12.17
A metal‐free domino multicomponent reaction for the direct C−H benzylation and alkylation of quinoxalin‐2(1H)‐ones using alkenes is described. Triggered by the sulfonyl radical generated from sulfinic acid, the alkenes are transformed to alkyl radicals that react exclusively at the C‐3 position of quinoxalin‐2(1H)‐ones. Importantly, the method not only functionalizes medicinally important quinoxalin‐2(1H)‐one
An environmentally benign protocol that affords propargylic sulfones containing highly congested carbon centers from easily accessible alcohols and sulfinic acids with water as the only byproduct is reported. The reaction proceeded via an in situ dehydrative cross-coupling process by taking advantage of the synergetic actions of multiple hydrogen bonds rather than relying on an external catalyst and/or
A reciprocal-activation strategy for allylic sulfination with unactivated allylicalcohols was developed. In this reaction, the hydrogen bond interaction between allylicalcohols and sulfinic acids allowed for reciprocal activation, which enabled a dehydrative cross-coupling process to occur under mild reaction conditions. This reaction worked in an environmentally friendly manner, yielding water as
The reaction of mercaptans with dimethyldioxirane. A facile synthesis of alkanesulfinic acids.
作者:D. Gu、David N. Harpp
DOI:10.1016/s0040-4039(00)60059-x
日期:1993.1
Dimethyldioxirae oxidizes aliphatic thiols to sulfinic acids in very good yield. Benzylic and aromatic thiols give a variety of other oxidation products using DMD.