Palladium-Catalyzed Cross-Coupling Reaction of Triorganoindium Reagents with Propargylic Esters
作者:Ricardo Riveiros、David Rodríguez、José Pérez Sestelo、Luis A. Sarandeses
DOI:10.1021/ol060192o
日期:2006.3.1
[reaction: see text] Triorganoindiumreagents (R(3)In) react with propargylic esters under palladium catalysis via an S(N)2' rearrangement to afford allenes in good yields and with high regioselectivity. The reaction proceeds smoothly at room temperature with a variety of R(3)In (aryl, alkenyl, alkynyl, and methyl). When chiral, nonracemic propargylic esters are employed, the reaction takes place with
Enantiospecific synthesis of 1,3-disubstituted allenes by palladium-catalyzed coupling of propargylic compounds with arylboronic acids
作者:Masahiro Yoshida、Tatsuro Okada、Kozo Shishido
DOI:10.1016/j.tet.2007.05.035
日期:2007.7
An enantiospecific coupling of propargylic esters and carbonates with arylboronicacids has been developed using a palladium catalyst. Optically active 1,3-disubstituted allenes were synthesized with high enantiomeric excesses by carrying out the reactions under basic aqueous conditions.