An unprecedented use of trifluoromethanesulfonyl hydrazides as effective SCF3 sources has been established in the sulfenylation of indoles. A range of substituted indoles participated in CuCl-catalyzed oxidative sulfenylation reaction with TfNHNHBoc in the presence of dimethyl sulfoxide to furnish structurally diverse 3-indolyl trifluoromethyl thioethers in moderate to good yields with very high regioselectivity
A novel electrophilic-type trifluoromethylthiolation reagent, a trifluoromethanesulfonyl hypervalentiodoniumylide, was designed and reacted well with various nucleophiles to afford the desired CF3S-substituted products. In situ reduction of the trifluoromethanesulfonyl group to give the trifluoromethylthio group, which is the key step in this process, was realized in the presence of copper(I) chloride
Direct electrophilic trifluoromethylthiolation of N-benzyl indoles using AgSCF3
作者:Lan Ma、Xiu-Fen Cheng、Yan Li、Xi-Sheng Wang
DOI:10.1016/j.tetlet.2016.05.086
日期:2016.7
A novel electrophilic trifluoromethylthiolation reactionsystem has been developed with AgSCF3 used directly as the SCF3 source, in the presence of KI/K2S2O8/I2. Various N-benzylindoles have been trifluoromethylthiolated successfully with this system, and the mechanism of investigation showed an electrophilicreagent was generated in situ.
在KI / K 2 S 2 O 8 / I 2的存在下,已经开发了一种新型的亲电子三氟甲基硫醇化反应系统,其中AgSCF 3直接用作SCF 3源。该系统已成功地将各种N-苄基吲哚三氟甲基硫醇化,研究机理表明原位产生了亲电试剂。
2‐Diazo‐1‐phenyl‐2‐((trifluoromethyl)sulfonyl)ethan‐1‐one: Another Utility for Electrophilic Trifluoromethylthiolation Reactions
2‐Diazo‐1‐phenyl‐2‐((trifluoromethyl)sulfonyl)ethan‐1‐one (diazo‐triflone) (2) is not only a building block but also a reagent. In this study, diazo‐triflone, which was originally used for the synthesis of β‐lactam triflones as a trifluoromethanesulfonyl (SO2CF3) building block under catalyst‐free thermal conditions, is redisclosed as an effective electrophilic trifluoromethylthiolation reagent under copper catalysis