Synthesis of β-Trifluoromethylated Ketones from Propargylic Alcohols by Visible Light Photoredox Catalysis
作者:Sehyun Park、Jung Min Joo、Eun Jin Cho
DOI:10.1002/ejoc.201500031
日期:2015.7
A practical method to access β-trifluoromethyl ketonesfrom readily available propargylicalcohols by visiblelight photocatalysis has been developed. Trifluoromethylation of propargylicalcohols with CF3I in the presence of Ru(bpy)3Cl2 as the photocatalyst followed by double-bond migration/keto-enol tautomerization provides β-trifluoromethyl ketones as the final product.
Base-Promoted Double-Bond-Migration/Hydrolysis/Isomerization of 4-Aryl-1,1,1-trifluorobut-2-en-2-yl Trifluoromethanesulfonates: A Metal-Free Approach to β-Trifluoromethyl Ketones
A metal‐free synthesis of 1‐aryl‐4,4,4‐trifluoromethylbutanones has been developed. Promoted by DBU, 4‐aryl‐1,1,1‐trifluorobut‐2‐en‐2‐yl trifluoromethanesulfonates were converted into 1‐aryl‐4,4,4‐trifluoromethylbutanones smoothly in moderate to excellent yields.