Ruthenium(II)-Catalyzed Alkene C–H Bond Functionalization on Cinnamic Acids: A Facile Synthesis of Versatile α-Pyrones
摘要:
An inexpensive ruthenium(1) complex enabled oxidative annulation of alkynes by using cinnamic acid derivatives to provide diversely decorated multisubstituted alpha-pyrones.
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.
Ruthenium(II)-Catalyzed Alkene C–H Bond Functionalization on Cinnamic Acids: A Facile Synthesis of Versatile α-Pyrones
作者:Rashmi Prakash、Kommuri Shekarrao、Sanjib Gogoi
DOI:10.1021/acs.orglett.5b02631
日期:2015.11.6
An inexpensive ruthenium(1) complex enabled oxidative annulation of alkynes by using cinnamic acid derivatives to provide diversely decorated multisubstituted alpha-pyrones.