Metal-Free Difluoromethylthiolation, Trifluoromethylthiolation, and Perfluoroalkylthiolation with Sodium Difluoromethane- sulfinate, Sodium Trifluoromethanesulfinate or Sodium Perfluoro- alkanesulfinate
A method for direct difluoromethylthiolation of Ar−H bonds is introduced. The stable and easy-to-handle HCF2SO2Na is reduced with (EtO)2P(O)H in the presence of TMSCl to generate HCF2S+ for the regioselective difluoromethylthiolation of aromatic compounds including indoles, pyrroles, and activated benzenes. This method is also applicable for the trifluoromethylthiolation with CF3SO2Na and the perf
介绍了一种直接的二氟甲硫基化Ar-H键的方法。在TMSCl存在下,用(EtO)2 P(O)H还原稳定易处理的HCF 2 SO 2 Na ,生成HCF 2 S +,用于芳香族化合物(包括吲哚,吡咯和活化)的区域选择性二氟甲基硫醇化反应苯。该方法也适用于用芳烃和杂芳烃用CF 3 SO 2 Na进行三氟甲基硫醇化和用R f SO 2 Na进行全氟烷基硫醇化。还讨论了与无金属亲电性氟代烷基硫基化反应相关的反应机理。
Difluoromethylthiolation of Phenols and Related Compounds with a HF<sub>2</sub>CSO<sub>2</sub>Na/Ph<sub>2</sub>PCl/Me<sub>3</sub>SiCl System
HF2CSO2Na/Ph2PCl/Me3SiCl system is disclosed for the late-stage direct difluoromethylthiolation of Csp2 and Csp3 nucleophiles. Difluoromethylthiolation of phenols and naphthols proceeded nicely under this system to regioselectively provide corresponding SCF2H compounds in good yields. Other substrates such as indoles, pyrroles, pyrazoles, enamines, ketones, and β-keto esters were also transformed to corresponding
公开了一种新颖的HF 2 CSO 2 Na / Ph 2 PC1 / Me 3 SiCl系统,用于C sp2和C sp3亲核试剂的后期直接二氟甲基硫醇化。在该系统下,苯酚和萘酚的二氟甲基硫醇化反应进展顺利,可以以高收率选择性地提供相应的SCF 2 H化合物。其他底物(如吲哚,吡咯,吡唑,烯胺,酮和β-酮酯)也以良好的产率转化为相应的SCF 2 H产物。还实现了许多天然产物和药学上有吸引力的分子的后期直接二氟甲基硫醇化。
Direct Electrophilic (Benzenesulfonyl)Difluoromethylthiolation with a Shelf-Stable Reagent
作者:Ermal Ismalaj、Didier Le Bars、Thierry Billard
DOI:10.1002/anie.201601280
日期:2016.4.4
properties which can provide access to new applications of fluoroalkylthiolated compounds. Direct introduction of this moiety can be performed by in an electrophilic manner by using a new shelf‐stablereagent, namely a (benzenesulfonyl)difluoromethanesulfenamide. Furthermore, mild magnesium‐mediated reduction of the PhSO2CF2S group leads to a facile synthesis of difluoromethylthiolated molecules and
A new method for the preparation of fluoroalkylthioethers including trifluoromethylthioether and difluoromethylthioether by iridium(I)-catalyzed deoxgenation of fluoroalkylsulfoxides with dimethyl diazomalonate was developed. In the reaction system, dimethyl diazomalonate was used as reducing reagent and the corresponding fluoroalkylthioethers were produced through oxygen atom transfer from fluoroalkylsulfoxides