Utility of phosphonium-substituted ester enolates as synthetic intermediates. A novel trialkylphosphine-catalyzed [3,3] rearrangement of allylic acrylates
作者:Takeshi Hanamoto、Yoshiyasu Baba、Junji Inanaga
DOI:10.1021/jo00054a004
日期:1993.1
A novel Ireland-type [3,3] rearrangement which utilizes a catalytic amount of a trialkylphosphine with allylic acrylates has been developed as a synthetic entry into alpha-methylene-gamma,delta-unsaturated carboxylic acids.
Highly Regio- and Enantioselective Hydrogenation of Conjugated α-Substituted Dienoic Acids
Highly regio- and enantioselective hydrogenation of conjugated α-substituted dienoic acids was realized for the first time using Trifer–Rh complex, providing a straightforward method for the synthesis of chiral α-substituted γ,δ-unsaturated acids. DFT calculations revealed N+H–O hydrogen bonding interaction is formed to stabilize the transition state and the coordination of 4,5-double bond to Rh(III)