Youssef, Abdel-Hamid A.; Sharaf, Saber M.; El-Sadany, Samir K., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 4, p. 359 - 361
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.
Chloroesterification of Enynes Catalyzed by NHC Rhodium Compounds
作者:Young Chung、Ji Young Baek、Sang Lee、So Sim
DOI:10.1055/s-2008-1032073
日期:——
An efficient rhodium N-heterocyclic carbene (NHC)-catalyzed chloroesterification of terminal alkynes and enynes has been developed. The reaction was highly regio- and stereospecific: the Z-isomer was obtained as the sole product.
Palladium-catalysed annulation of β-chloro-α,β-unsaturated esters with internal alkynes leading to 2H-pyran-2-ones
作者:Ruimao Hua、Masato Tanaka
DOI:10.1039/b007620l
日期:——
Heteroannulation
of β-chloro-α,β-unsaturated esters with internal alkynes proceeded in the presence of triethylamine
and palladium complexes, bis(triphenylphosphine)palladium species in particular, to afford to 2H-pyran-2-ones.
Treatment of methyl (Z)-3-chloro-2-heptenoate with Pd(PPh3)4 generates [(Z)-1-butyl-2-methoxycarbonylethenyl]chlorobis(triphenylphosphine)palladium ia oxidative addition, which gives the corresponding 2H-pyran-2-one upon addition
of 4-octyne. Terminal alkynes also reacted with β-chloro-α,β-unsaturated esters, but the major products were
β-alkynylated α,β-unsaturated
esters.
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
The cross-coupling of activated alkyl halides with carbon tetrachloride or substituted trichloromethanes can be obtained electrochemically in good yield in an undivided cell with a sacrificial anode.