A New and Improved Synthesis of trans-1,2-Diiodoalkenes and Their Stereospecific and Highly Regioselective Trifluoromethylation
摘要:
Reaction of terminal alkynes with iodine in the presence of CuI (5%) in acetonitrile under reflux for several hours gave the trans-1,2-diiodoalkenes in high yields. The trifluoromethylation of these diiodides using FSO2CF2CO2Me/CuI/DMF proceeded in excellent yields in a stereospecific and highly regioselective manner.
1,2‐(Bis)trifluoromethylation of Alkynes: A One‐Step Reaction to Install an Underutilized Functional Group
作者:Shuo Guo、Deyaa I. AbuSalim、Silas P. Cook
DOI:10.1002/anie.201905247
日期:2019.8.19
of olefins is the quintessential approach to tuning alkene reactivity. In this context, the exploration of trifluoromethyl groups as divergent electronic modifiers has not been considered. In this work, we describe a copper‐mediated 1,2‐(bis)trifluoromethylation of acetylenes to create E‐hexafluorobutenes (E‐HFBs) under blue light in a single step. The reaction proceeds with high yield and E/Z selectivity
reactions of a variety of fluoroalkenes using HSnBu3 and UV irradiation have been developed. The reactions occur under mild conditions via a radical chain pathway in good yields and with moderate selectivity. In addition, the synthesis of tin derivatives of fluorinated alkenes was investigated in order to study their applicability for Stille type cross-coupling reactions.
A New and Improved Synthesis of <i>trans</i>-1,2-Diiodoalkenes and Their Stereospecific and Highly Regioselective Trifluoromethylation
作者:Jianxin Duan、William R. Dolbier,、Qing-Yun Chen
DOI:10.1021/jo9816663
日期:1998.12.1
Reaction of terminal alkynes with iodine in the presence of CuI (5%) in acetonitrile under reflux for several hours gave the trans-1,2-diiodoalkenes in high yields. The trifluoromethylation of these diiodides using FSO2CF2CO2Me/CuI/DMF proceeded in excellent yields in a stereospecific and highly regioselective manner.