A novel deoxygenation–isomerization reaction of 4-hydroxy-2-ynoic esters and γ-hydroxy-α,β-ynones
摘要:
(2E, 4E)-Dienoic esters and (E,E)-α,β:γ,δ-dienones have been stereoselectlectively synthesured from 4-hydroxy-2-ynoic esters and γ-hydroxy-α,β-ynones by their reactions with triphenylphosphine under mild conditions.
3,3′-Anisyl-Substituted BINOL, H<sub>4</sub>BINOL, and H<sub>8</sub>BINOL Ligands: Asymmetric Synthesis of Diverse Propargylic Alcohols and Their Ring-Closing Metathesis to Chiral Cycloalkenes
作者:Yang Yue、Mark Turlington、Xiao-Qi Yu、Lin Pu
DOI:10.1021/jo9018446
日期:2009.11.20
aldehydes. It catalyzed the reactions of alkyl propiolates with 88−99% ee; the reactions of phenylacetylene with 81−87% ee; the reactions of 4-phenyl-1-butyne, an alkyl alkyne, with 77−89% ee; and the reactions of trimethylsilylacetylene with 92−97% ee. The optically active propargylic alcohols generated from this catalytic asymmetric alkyne addition were observed to undergo efficient ring-closing-metathesis
A facile synthetic method of α-quaternary-β,γ-unsaturated aldehydes via the stereoselective 1,4-elimination and α-regioselective Ferrier reaction
作者:Eiji Tayama、Ryo Hashimoto
DOI:10.1016/j.tetlet.2007.09.049
日期:2007.11
The 1,4-elimination reaction of 2-substituted-(2Z)-4-methoxy-O-alkenyl acetals with n-butyllithium is shown to afford the 2-substituted-(1Z,3E)-O-1,3-dienyl acetals in high stereoselectivities. The Ferrier reaction of the O-1,3-dienyl acetals thus obtained provides the corresponding alpha-quaternary-beta,gamma-unsaturated aldehydes in excellent yields with high alpha-regioselectivities. (c) 2007 Elsevier Ltd. All rights reserved.
A total synthesis of racemic avenaciolide
作者:John L. Herrmann、Mitchel H. Berger、R. H. Schlessinger
DOI:10.1021/ja00500a029
日期:1979.3
Gold(I)-Catalyzed Tandem Alkoxylation/Lactonization of γ-Hydroxy-α,β-Acetylenic Esters
作者:Rubén S. Ramón、Christophe Pottier、Adrián Gómez-Suárez、Steven P. Nolan
DOI:10.1002/adsc.201100115
日期:2011.6
The formation of 4‐alkoxy‐2(5H)‐furanones was achieved via tandemalkoxylation/lactonization of γ‐hydroxy‐α,β‐acetylenic esters catalyzed by 2 mol% of [2,6‐bis(diisopropylphenyl)imidazol‐2‐ylidine]gold bis(trifluoromethanesulfonyl)imidate [Au(IPr)(NTf2)]. The economic and simple procedure was applied to a series of various secondary propargylic alcohols allowing for yields of desired product of up
A novel deoxygenation–isomerization reaction of 4-hydroxy-2-ynoic esters and γ-hydroxy-α,β-ynones
作者:Cheng Guo、Xiyan Lu
DOI:10.1039/c39930000394
日期:——
(2E, 4E)-Dienoic esters and (E,E)-α,β:γ,δ-dienones have been stereoselectively synthesized from 4-hydroxy-2-ynoic esters and γ-hydroxy-α,β-ynones by their reactions with triphenylphosphine under mild conditions.
(2E, 4E)-Dienoic esters and (E,E)-α,β:γ,δ-dienones have been stereoselectlectively synthesured from 4-hydroxy-2-ynoic esters and γ-hydroxy-α,β-ynones by their reactions with triphenylphosphine under mild conditions.