Structure–Reactivity Relationship of Trifluoromethanesulfenates: Discovery of an Electrophilic Trifluoromethylthiolating Reagent
作者:Xinxin Shao、Chunfa Xu、Long Lu、Qilong Shen
DOI:10.1021/jo502645m
日期:2015.3.20
A family of electrophilic trifluoromethanesulfenates was prepared. Structure–reactivity relationship studies showed that the substituted groups on the aryl ring of the trifluoromethylthiolating reagent did not have an obvious influence on their reactivities. A simplified electrophilic trifluoromethylthiolating reagent 1c was then identified that can react with a wide range of nucleophiles such as Grignard
Copper‐catalyzeddirect perfluoroalkylthiolation of alkynes by using the corresponding perfluoroalkanesulfenamide reagent is reported. The selective mono‐ and bis‐perfluoroalkylthiolation of alkynes can be conducted under very mild conditions (no base, room temperature) in very good to excellent yields. This approach, which uses a low toxicity, inexpensive copper catalyst that incorporates a commercially
Metal-Free Oxidative Trifluoromethylthiolation of Terminal Alkynes with CF<sub>3</sub>SiMe<sub>3</sub> and Elemental Sulfur
作者:Chao Chen、Lingling Chu、Feng-Ling Qing
DOI:10.1021/ja305801m
日期:2012.8.1
A metal-free oxidative trifluoromethyl-thiolation of terminalalkynes using readily available CF(3)SiMe(3) and elemental sulfur at room temperature has been developed. This reaction provides an efficient and convenient method for the preparation of alkynyl trifluoromethyl sulfides bearing a wide range of functional groups. Preliminary investigation revealed that elemental sulfur instead of air acted
A large number of trifluoromethylthiolation methods have been developed, but a trifluoromethylthiolation reagent usually has to be used in these methods. Herein we describe a difluorocarbene-based trifluoromethylthiolation of terminal alkynes to construct a Csp-SCF3 bond catalysed by a copper complex. Ph3P+CF2CO2-/S8/F- was used as a reagent system to form the CF3S- anion, and the sequential formation
已经开发了大量的三氟甲基硫醇化方法,但是在这些方法中通常必须使用三氟甲基硫醇化试剂。在本文中,我们描述了末端炔烃的基于二氟卡宾的三氟甲基硫醇化,以构建由铜配合物催化的Csp-SCF 3键。用Ph 3 P + CF 2 CO 2- / S 8 / F-作为试剂体系形成CF 3 S-阴离子,依次形成CF 2 = S,F-CF 2 S和C-SCF 3一步一步就可以实现纽带。
Rhodium(I)‐Catalyzed Regioselective Azide‐internal Alkynyl Trifluoromethyl Sulfide Cycloaddition and Azide‐internal Thioalkyne Cycloaddition under Mild Conditions
A regioselective method to access fully substituted 5‐trifluoromethylthio‐1,2,3‐triazoles and 5‐thio‐1,2,3‐triazoles from the internal alkynyl trifluoromethyl sulfides and internal thioalkynes by a rhodium(I)‐catalyzed azide‐alkyne cycloaddition (RhAAC) reaction under mild conditions has been developed. This approach features good compatibility with water and air, a broad substrate scope, good functional