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
<i>N</i>-Trifluoromethylthiosaccharin: An Easily Accessible, Shelf-Stable, Broadly Applicable Trifluoromethylthiolating Reagent
作者:Chunfa Xu、Bingqing Ma、Qilong Shen
DOI:10.1002/anie.201403983
日期:2014.8.25
A new, electrophilic trifluoromethylthiolating reagent, N‐trifluoromethylthiosaccharin, was developed and can be synthesized in two steps from saccharin within 30 minutes. N‐trifluoromethylthiosaccharin is a powerful trifluoromethylthiolating reagent and allows the trifluoromethylthiolation of a variety of nucleophiles such as alcohols, amines, thiols, electron‐rich arenes, aldehydes, ketones, acyclic
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
Oxidative Trifluoromethylthiolation of Terminal Alkynes with AgSCF<sub>3</sub>: A Convenient Approach to Alkynyl Trifluoromethyl Sulfides
作者:Sheng-Qing Zhu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1002/ejoc.201402533
日期:2014.7
new method for the efficient synthesis of alkynyl trifluoromethyl sulfides was developed. By combining AgSCF3 and NCS in N,N-dimethylacetamide, an electrophilic active intermediate was produced, which was then treated with a variety of terminalalkynes to afford the corresponding trifluoromethanesulfenylated products in moderate to excellent yields.