We report the metal-free chalcogenation of cycloketone oxime esters with dichalcogenides via a radical process. Because of the metal-free condition and use of readily accessible dichalcogenides, this method is an effective and green strategy for the synthesis of chalcogen-substituted butyronitrile.
An expeditious and efficient bromomethylation of thiols: enabling bromomethyl sulfides as useful building blocks
作者:Carolina Silva-Cuevas、Ehecatl Paleo、David F. León-Rayo、J. Armando Lujan-Montelongo
DOI:10.1039/c8ra04002h
日期:——
A new method for the bromomethylation of thiols using paraformaldehyde and HBr/AcOH, minimizes the generation of toxic byproducts. Synthetic utility of α-bromomethyl sulfides was demonstrated through umpolung and free radical chemistry.
Copper-Catalyzed Coupling Reactions of Cyclobutanone Oxime Esters with Sulfur Nucleophiles at Room Temperature
作者:Mingchuang He、Zhaohua Yan、Fuyuan Zhu、Sen Lin
DOI:10.1021/acs.joc.8b02707
日期:2018.12.21
A copper-catalyzed iminyl radical-mediated C–C bond cleavage/cross-coupling tandem reaction of cyclobutanone oxime esters with aryl thiols in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) at room temperature was developed, and aryl cyanopropyl sulfides were smoothly synthesized in 20–88% yields. By altering the copper reagent and the molar ratio of cyclobutanone oxime ester/aryl thiol/DBU
Nickel-Catalyzed Reductive Thiolation of Unactivated Alkyl Bromides and Arenesulfonyl Cyanides
作者:Fei Wang、Weidong Rao、Shun-Yi Wang
DOI:10.1021/acs.joc.1c00903
日期:2021.7.2
alkyl bromides with arenesulfonyl cyanides catalyzed by Ni(acac)2 under reductive conditions to form unsymmetrical sulfides is developed. This approach for sulfide synthesis is practical, relies on available, unfunctionalized materials such as alkyl (pseudo)halides, and is scalable. This catalytic strategy provides a complementary method for the preparation of unsymmetrical alkyl–aryl sulfides under