Ruthenium Catalyzed Reductive Coupling of Paraformaldehyde to Trifluoromethyl Allenes: CF3-Bearing All-Carbon Quaternary Centers
摘要:
Trifluoromethyl substituted allenes engage in ruthenium catalyzed reductive couplings with paraformaldehyde to form products of hydrohydroxymethylation as single regioisomers. This method enables generation of CF3-bearing all-carbon quaternary stereocenters.
Catalytic One-Step Deoxytrifluoromethylation of Alcohols
作者:Francisco de Azambuja、Sydney M. Lovrien、Patrick Ross、Brett R. Ambler、Ryan A. Altman
DOI:10.1021/acs.joc.8b03072
日期:2019.2.15
A new bench-stable trifluoromethylation reagent, phenyl bromodifluoroacetate, converts readily available alcohols to trifluoromethanes in a Cu-catalyzed deoxytrifluoromethylation reaction. This reaction streamlines access to target biologically active molecules, and should be useful for a variety of medicinal, agricultural, and materials chemists.
Copper-Catalyzed Decarboxylative Trifluoromethylation of Propargyl Bromodifluoroacetates
作者:Ryan Altman、Brett Ambler、Santosh Peddi
DOI:10.1055/s-0033-1339128
日期:——
The development of efficient methods for accessing fluorinated functional groups is desirable. Herein, we report a two-step method that utilizes catalytic copper for the decarboxylative trifluoromethylation of propargyl bromodifluoroacetates is described. This protocol affords a mixture of propargyl trifluoromethanes and trifluoromethyl allenes.