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.
The First Example of Rhodium(I)-Catalyzed Regio- and Stereoselective Chloroesterification of Alkynes with Chloroformate Esters
作者:Ruimao Hua、Shigeru Shimada、Masato Tanaka
DOI:10.1021/ja9822299
日期:1998.12.1
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.