An efficient method for the iron(III) porphyrincatalyzed olefination of various aldehydes with 2,2,2‐trifluorodiazoethane (CF3CHN2) under neutral conditions has been developed. This reaction is an important supplement to the synthetic applications of CF3CHN2.
Controlled Trifluoromethylation Reactions of Alkynes through Visible-Light Photoredox Catalysis
作者:Naeem Iqbal、Jaehun Jung、Sehyun Park、Eun Jin Cho
DOI:10.1002/anie.201308735
日期:2014.1.7
The control of a reaction that can form multiple products is a highly attractive and challenging concept in synthetic chemistry. A set of valuable CF3‐containing molecules, namely trifluoromethylated alkenyl iodides, alkenes, and alkynes, were selectively generated from alkynes and CF3I by environmentally benign and efficient visible‐light photoredoxcatalysis. Subtle differences in the combination
A Reverse Wittig Coupling with Trifluoroacetaldehyde: A Convenient One-Step Synthesis of Trifluoromethyl Alkenes
作者:Shainaz Landge、Dmitry Borkin、Bela Torok
DOI:10.2174/157017809789124795
日期:2009.9.1
A novel, mild synthesis of aryl-3,3,3-trifluoropropenes by Wittig olefination of benzylphosphonium ylides with in-situ generated trifluoroacetaldehyde is described. The in-situ formed trifluoroacetaldehyde efficiently traps the Wittig ylides and yields trifluoromethyl alkenes without the troublesome handling. The scope of the reaction was tested in reaction of trifluoroacetaldehyde with a wide variety of benzylphosphonium ylides. The α-trifluoromethyl alkenes were isolated in good to excellent yields in a convenient one step process.