A Free‐Radical Reduction and Cyclization of Alkyl Halides Mediated by FeCl
<sub>2</sub>
作者:Feba Thomas Pulikottil、Ramadevi Pilli、Vetrivelan Murugesan、Chandu G. Krishnan、Ramesh Rasappan
DOI:10.1002/cctc.201900230
日期:2019.5.20
Iron mediated catalytic reactions are of great interest in the field of organic synthesis because they are economic and naturally abundant. However, the use of iron catalyst in the field of free radicalcyclization or reduction of alkyl halides remains limited. Here we describe the use of an unprecedented combination of iron and zinc in the reduction and 5‐exo‐trig radicalcyclization of alkyl halides
Indium hydride: a novel radical initiator in the reduction of organic halides with tributyltin hydride
作者:Katsuyuki Inoue、Akemi Sawada、Ikuya Shibata、Akio Baba
DOI:10.1016/s0040-4039(01)00816-4
日期:2001.7
Dichloroindium hydride (Cl2InH), which was generated in situ by transmetallation between tributyltinhydride and indium trichloride, acted as a novel radical initiator for the reduction of organic halides with tributyltinhydride. The reaction was revealed to proceed through a radical process under non-oxygen conditions at room temperature, and to be applicable to intramolecular radical cyclizations
Indirectelectrochemicalradicalcyclization of halogeno ethers is achieved under mild conditions using nickel(II) complexes as electron-transfercatalysts.
卤代醚的间接电化学自由基环化是在温和的条件下使用镍(II)配合物作为电子转移催化剂实现的。
REACTION OF COBALOXIME(I), WITH 2-ALLYLOXYETHYL HALIDES. EVIDENCE FOR AN ELECTRON TRANSFER MECHANISM
作者:Masaru Tada、Masami Okabe
DOI:10.1246/cl.1980.201
日期:1980.2.5
Reaction of Cobaloxime(I), (CoI)− , with 2-allyloxyethyl halides (1, 2, and 3) gave cyclized organocobaloximes (5) formed by intramolecularrearrangement of 2-allyloxyethyl radicals to (3-tetrahydrofuranyl)methyl radicals. The intermediate radical must be formed by an electron transfer process which competes with an SN2 reaction to give a non-cyclized organocobaloximes.
Application of Solid Me<sub>3</sub>SiZnI for the Synthesis of Aryl and Alkyl Trimethylsilanes
作者:Anirban Ganguly、Revathi Chandrasekaran、Bala S. S. Balamurugan、Ramesh Rasappan
DOI:10.1002/adsc.202301298
日期:2024.3.19
group compatibility renders silylzinc reagents desirable; however, their development is hindered by their synthesis using pyrophoric silyllithium and dissolved lithium salts. Our solid Me3SiZnI circumvents these limitations and herein, we demonstrate its significance in the cross-coupling of aryl and alkyl bromides.