Abstract 3-CF3S substituted thioflavones and benzothiophenes were achieved via the reactions of AgSCF3 with methylthiolated alkynones and alkynylthioanisoles, respectively, promoted by persulfate. This protocol possesses good functional group tolerance and high yields. Mechanistic studies suggested that a classic two-step radical process was involved, which includes addition of CF3S radical to triple
A facile and general route to 3-((trifluoromethyl)thio)benzofurans and 3-((trifluoromethyl)thio)benzothiophenes
作者:Jie Sheng、Congbin Fan、Jie Wu
DOI:10.1039/c4cc01904k
日期:——
A facile and general route to 3-((trifluoromethyl)thio)benzofurans and 3-((trifluoromethyl)thio)benzothiophenes is reported. The reactions of trifluoromethanesulfanylamide with 1-methoxy-2-alkynylbenzenes or methyl(2-alkynylphenyl)sulfanes promoted by BiCl3 proceed smoothly with broad functional group tolerance.
Intramolecular Heterocyclization/Fluoromethylthiolation of Alkynes Enabled by a Multicomponent Reagent System
作者:Xuemin Li、Fengxia Sun、Haofeng Shi、Beibei Zhang、Jiaxin He、Jialiang Wu、Yunfei Du
DOI:10.1021/acs.orglett.3c01095
日期:2023.5.19
system for the one-potsynthesis of di/trifluoromethylthiolated heterocycles from alkynes. The reaction was postulated to proceed via a cascade sequence involving the oxidation of BnSRf by mCPBA, activation of the in situ-generated sulfoxide by Tf2O, and intramolecular cyclization/fluoromethylthiolation of the alkyne substrates enabled by the formed electrophilic sulfonium salt to give di/trifluoromethylthiolated
BnSR f (R f = CF 2 H 或 CF 3 )/ m CPBA/Tf 2 O 系统被发现是一种有效的多组分试剂系统,可用于从炔烃一锅法合成二/三氟甲基硫醇化杂环。假定该反应通过级联序列进行,包括通过m CPBA氧化 BnSR f ,通过 Tf 2 O激活原位生成的亚砜,以及通过形成的亲电子硫盐使炔烃底物发生分子内环化/氟甲基硫醇化得到二/三氟甲基硫醇化杂环。