One-pot tandem hydrophenylation and ionic hydrogenation of 3-phenylpropynoic acid derivatives under superelectrophilic activation
摘要:
The reactions of esters and amides of 3-phenylpropynoic acid with strong Lewis acids AIX(3) (X = Cl, Br) or conjugate Bronsted-Lewis superacids HX-AIX(3) (X = Cl, Br) in benzene and cyclohexane at room temperature afforded 3,3-diphenylpropanoic acid derivatives in up to 94% yield. This tandem reaction of the acetylene bond proceeded by hydrophenylation followed by ionic hydrogenation. (C) 2015 Published by Elsevier Ltd.
General and Selective Synthesis of (<i>Z</i>)-3-Haloacrylates via Palladium-Catalyzed Carbonylation of Terminal Alkynes
作者:Jin-Heng Li、Shi Tang、Ye-Xiang Xie
DOI:10.1021/jo048358r
日期:2005.1.1
A general and selective palladium-catalyzedcarbonylation of terminal alkynes method for the synthesis of (Z)-3-haloacrylates is presented. In the presence of a catalytic amount of PdX2 and 5 equiv of CuX2 (X = Cl and Br), terminal alkynes were carbonylated to afford the corresponding (Z)-3-haloacrylates exclusively in moderate to good yields. The results showed that the effect of solvent had a fundamental
Convenient and direct preparation of tertiary phosphines via nickel-catalysed cross-coupling
作者:David J. Ager、Scott A. Laneman
DOI:10.1039/a705106i
日期:——
Nickel-catalysed cross-coupling of aryl sulfonates and aryl halides with chlorodiphenylphosphine and a reductant directly affords tertiary phosphines, which have application in a wide variety of asymmetric catalysis.