a new desulfurative method for generating primary, secondary, and tertiary alkyl radicals through visible‐light photoredoxcatalysis. A process that involves the generation of N‐centered radicalsfrom sulfinamide intermediates, followed by subsequent fragmentation, is critical to forming the corresponding alkyl radical species. This strategy has been successfully applied to conjugate addition reactions
A CONVENIENT PREPARATION OF SULPHINIC ESTERS FROM SULPHINYL CHLORIDES AND CHLOROSULPHITES USING HEXAMETHYLDISILOXANE AS CHLORIDE ANION ACCEPTOR
作者:Jozef Drabowicz
DOI:10.1246/cl.1981.1753
日期:1981.12.5
Sulphinic esters can be obtained in high yields by the reaction of sulphinylchlorides with chlorosulphites in the presence of hexamethyldisiloxane and catalytic amount of dimethyl sulphoxide.
regiospecific alkyl addition reaction of (hetero)arene-fused thiophenes has been developed, employing bench-stable N-benzoyl alkyl-sulfinamides as the alkyl sources. This protocol offers a unique desulfuration approach to generate alkyl radicals that proceeds via nitrogen-centered radical intermediates.
Direct synthesis of sulfinic esters via ultrasound accelerated tandem reaction of thiols and alcohols with <i>N</i>-bromosuccinimide
作者:Lan-Anh Thi Nguyen、Tri-Nghia Le、Cong-Thang Duong、Chi-Tam Vo、Fritz Duus、Thi Xuan Thi Luu
DOI:10.1080/17415993.2021.1928669
日期:2021.9.3
The direct transformation of various thiols and simple alcohols with N-bromosuccinimide into sulfinic esters has been investigated by using different categories of base/acidic catalysts as well as co-solvents under varied reaction conditions. The reaction was found out to afford the sulfinic esters with high yields in the absence of catalysts, especially within the shorter time under the acceleration
Intramolecular Homolytic Substitution Enabled by Photoredox Catalysis: Sulfur, Phosphorus, and Silicon Heterocycle Synthesis from Aryl Halides
作者:Alberto F. Garrido-Castro、Noelia Salaverri、M. Carmen Maestro、José Alemán
DOI:10.1021/acs.orglett.9b01911
日期:2019.7.5
homolytic substitution with the practicality of the modern photocatalytic approach. Predicated on an efficient metal-free dehalogenation of aryl halides under mild organo-photoredox conditions, sulfur, phosphorus, and silicon heteroatoms capture the C(sp2)-centered radical in an intramolecular fashion.