Photoredox Mediated Nickel Catalyzed Cross-Coupling of Thiols With Aryl and Heteroaryl Iodides via Thiyl Radicals
作者:Martins S. Oderinde、Mathieu Frenette、Daniel W. Robbins、Brian Aquila、Jeffrey W. Johannes
DOI:10.1021/jacs.5b11244
日期:2016.2.17
Ni-catalyzed cross-couplings of aryl, benzyl, and alkyl thiols with aryl and heteroaryl iodides were accomplished in the presence of an Ir-photoredox catalyst. Highly chemoselective C-Scross-coupling was achieved versus competitive C-O and C-Ncross-couplings. This C-Scross-coupling method exhibits remarkable functional group tolerance, and the reactions can be carried out in the presence of molecular
A new method for the preparation of alkyl aryl sulfides through direct oxidative thiolation of alkanes or ethers with arylsulfonylhydrazides using di-tert-butyl peroxide (DTBP) as an oxidant catalyzed by Pd(OAc)2 has been reported. The C-H bonds in various alkanes or ethers were successfully converted into C-S bonds to yield the corresponding sulfides in moderate to good yields.
Preparation of Adamantyl Sulfides with [Bis(1-adamantanecarboxy)iodo]arenes and Disulfides
作者:Hideo Togo、Takahito Muraki、Masataka Yokoyama
DOI:10.1055/s-1995-3877
日期:1995.2
Irradiation of [bis(1-adamantanecarboxy)iodo]arenes with a high-pressure mercury lamp in the presence of disulfides gives the corresponding adamantyl sulfides in high yields. This reaction proceeds via the radical decarboxylation of [bis(1-adamantanecarboxy)iodo]arenes followed by SH2 reaction of the carbon radical on the disulfide.
Nickel Catalyzed Cross-Coupling of Aryl and Alkenyl Triflates with Alkyl Thiols
作者:Regina M. Oechsner、Ivo H. Lindenmaier、Ivana Fleischer
DOI:10.1021/acs.orglett.3c00218
日期:2023.3.17
We report a nickel catalyzed C–S cross-coupling of aryl and alkenyl triflates with alkyl thiols. A variety of the corresponding thioethers were synthesized using an air-stable nickel precatalyst under mild reaction conditions with short reaction times. A broad substrate scope, including pharmaceutically relevant compounds, could be demonstrated.
Represented herein is a simple thiol identified as an effective precursor to photochemically form a carbocation. Thanks to the thiyl radical rapid transformation to disulfide, which serves not only to stabilize the generated thiyl radical but also to allow the second electron transfer to form a carbocation. The resulting carbocations, including primary benzylic, secondary, and tertiary carbocations