Cp<sub>2</sub>TiCl<sub>2</sub>-catalyzed hydrocarboxylation of alkynes with CO<sub>2</sub>: formation of α,β-unsaturated carboxylic acids
作者:Peng Shao、Sheng Wang、Gaixia Du、Chanjuan Xi
DOI:10.1039/c6ra25003c
日期:——
Cp2TiCl2-catalyzed hydrocarboxylation of alkynes with CO2 (atmospheric pressure) has been reported. A range of alkynes were transformed to the corresponding α,β-unsaturatedcarboxylicacids in high yields with high regioselectivity. The reaction proceeded with hydrotitanation, transmetalation, and subsequently carboxylation with CO2.
Highly Regio- and Stereoselective Three-Component Nickel-Catalyzed syn-Hydrocarboxylation of Alkynes with Diethyl Zinc and Carbon Dioxide
作者:Suhua Li、Weiming Yuan、Shengming Ma
DOI:10.1002/anie.201007128
日期:2011.3.7
Hydrocarboxylation of alkynes: The first example of nickel‐catalyzed hydrozincation of alkynes that form stereodefined hydrocarboxylation products is presented (see scheme; cod=cycloocta‐1,5‐diene). This catalytic system is efficient for the activation of CO2 and the three‐component reaction produces products that could be converted into important oxindole or γ‐butyrolactam derivatives.