α-Arylation of Esters Catalyzed by the Pd(I) Dimer {[P(<i>t-</i>Bu)<sub>3</sub>]PdBr}<sub>2</sub>
作者:Takuo Hama、John F. Hartwig
DOI:10.1021/ol8002578
日期:2008.4.1
Conditions for the coupling of bromoarenes with esters using a single base and catalyst with improved turnovernumbers are described. These general conditions were made possible by using the Pd(I) catalyst [P(t-Bu)3]PdBr}2. Reactions of acetates, propionates, and isobutyrates are presented, and reactions of all three classes of esters on a 10 g scale are described.
a-ARYLATION OF ESTERS CATALYZED BY THE Pd(I) DIMER [P(t-Bu)3Pd(&#956;-Br)]2
作者:Huang, David S.、DeLuca, Ryan J.、Hartwig, John. F.
DOI:10.15227/orgsyn.088.0004
日期:——
Palladium-Catalyzed α-Arylation of Esters with Chloroarenes
作者:Takuo Hama、John F. Hartwig
DOI:10.1021/ol800258u
日期:2008.4.1
Palladium-catalyzed alpha-arylations of esters with chloroarenes are reported. The reactions of chloroarenes with the sodium enolates of tert-butyl propionate and methyl isobutyrate occur in high yields with 0.2-1 mol % of [P(t-Bu)3]PdBr}2 or the combination of Pd(dba)2 and P(t-Bu)3 as catalyst. The reactions of chloroarenes with the Reformatsky reagent of tert-butylacetate were most challenging but occurred