Copper-catalyzed Decarboxylative Hydroboration: Synthesis of Vinyl Boronic Esters
作者:Francis Mariaraj Irudayanathan、Gabriel Charles Edwin Raja、Han-Sung Kim、Kyungsu Na、Sunwoo Lee
DOI:10.1002/bkcs.10706
日期:2016.4
Vinyl boronic esters were synthesized from aryl alkynyl carboxylic acids and bis(pinacolato)diboron using a copper‐catalyzed decarboxylative reaction. The reaction was conducted with CuI (10 mol%), bis‐[2‐(diphenylphosphino)phenyl]ether(20 mol%), and LiOMe (20 mol%) in DMSO at 50 °C for 16 h. This method provided the desired vinyl boronic esters in good‐to‐moderate yields and showed good functional
Practical Synthesis of Unsymmetrical Diarylacetylenes from Propiolic Acid and Two Different Aryl Bromides
作者:Stefano Tartaggia、Ottorino De Lucchi、Lukas J. Gooßen
DOI:10.1002/ejoc.201101770
日期:2012.3
A palladium catalyst that mediates the one-pot sequential Sonogashira and decarboxylative coupling of propiolic acid with two different arylbromides has been developed. Selective coupling of the first arylbromide was achieved in the presence of a copper-free, monometallic catalyst generated in situ from allylpalladium chloride dimer and SPhos with tetra-n-butylammonium fluoride as the base in an