A visible-light-driven carboxylation of aryl and alkenyl triflates with CO2 is developed by using a combination of Pd and photoredox catalysts. This reaction proceeds under mild conditions and can be applied to a wide range of substrates including acyclic alkenyl triflates.
Carboxylation of Alkenyl Boronic Acids and Alkenyl Boronic Acid Pinacol Esters with CO<sub>2</sub>
Catalyzed by Cuprous Halide
作者:Junting Hong、Onkar S. Nayal、Fanyang Mo
DOI:10.1002/ejoc.202000288
日期:2020.5.22
Three kinds of alkenylboron compounds were effectively transformed into the corresponding α, β‐unsaturated carboxylic acids in moderate to high yields through a cuprous halide catalyzed carboxylation with CO2. The advantages of this method include low cost, mild conditions, simple operation, broad scope, and external ligand free.
Palladium complexes of phosphinamine ligands in the intramolecular asymmetric Heck reaction
作者:Denis Kiely、Patrick J Guiry
DOI:10.1016/j.jorganchem.2003.09.045
日期:2003.12
The synthesis of two novel cyclisation substrates for the asymmetric intramolecular Heckreaction is reported. Their cyclisation, in addition to a known substrate for cis-decalin formation, were tested with palladium complexes of BINAP and heterobidentate oxazoline-containing ligands. In general BINAP provides a more active catalyst system for the range of substrates tested although excellent enantioselectivities
Bis(alkylthio)carbenes as Novel Reagents for Organic Synthesis
作者:James H. Rigby、Stephane Laurent、Weitong Dong、M.Diana Danca
DOI:10.1016/s0040-4020(00)00855-3
日期:2000.12
Bis(alkylthio)carbenes have been shown to be a useful class of reactive intermediates for applications to organic synthesis. Substituted hydroindolanes, isatins and hydroquinolones can be prepared by the addition of these carbenes to vinyl isocyanates. (C) 2000 Elsevier Science Ltd. All rights reserved.