Palladium-Catalyzed Synthesis of Aryl Vinyl Sulfides via 1,3-Oxathiolanes As Vinyl Sulfide Surrogates
作者:Jason R. Schmink、Summer A. Baker Dockrey、Tianyi Zhang、Naomi Chebet、Alexis van Venrooy、Mary Sexton、Sarah I. Lew、Steffany Chou、Ami Okazaki
DOI:10.1021/acs.orglett.6b03249
日期:2016.12.16
A nontraditional approach to synthesizing arylvinylsulfides is described. 2,2-Diphenyl-1,3-oxathiolane slowly liberates a vinylsulfide anion under basic conditions. Using a Pd/Xantphos catalyst system to activate a wide range of aryl bromides, this transient sulfide species can be effectively trapped and fed into a traditional Pd0/PdII catalytic cycle. Scope and limitations of the methodology are
A new strategy for the C(sp2)–H imidation and 1,2-imidofluorination of vinylsulfides has been established through simple treatment with N-fluorobis(benzenesulfonyl)imide, which acts as both oxidant and nitrogen source. For alkyl and electron-rich aryl vinylsulfides, alkyl/arylthioenamines are produced in up to 92% total yields. However, for steric and electron-deficient aryl vinylsulfides, 1,2-imidofluorination
Base-Promoted Synthesis of Vinyl Sulfides from Sulfonium Triflates
作者:Pan Gao、Qingzheng Zhang、Feng Chen
DOI:10.1021/acs.orglett.2c03095
日期:2022.10.28
A new protocol has been developed for vinyl sulfide synthesis promoted by an alkoxy base under metal-free conditions. In this reaction, aryl and alkenyl sulfonium triflates with diverse functionalities are converted into vinyl sulfides with excellent reactivity. This transformation features mild and safe reaction conditions that avoid catalyst, transition metal, high-pressure gas, and high reaction