Synthesis of substituted 2-cyclopenten-1-ones from oxodithioesters via a domino process
作者:Florence Corbin、Carole Alayrac、Patrick Metzner
DOI:10.1016/s0040-4039(99)00238-5
日期:1999.3
thiocarbonyl moiety. Subsequent ring closure was effected by intramolecular addition of the carbanion, generated in situ, to the δ-carbonyl function leading to 2-cyclopenten-1-ones. While most described intramolecular procedures involve a base-catalysed cyclisation, our method is induced by an addition reaction. It is a new efficient synthesis of substituted 2-cyclopenten-1-ones via a domino process.
[EN] SYNTHESIS OF SUBSTITUTED CYCLOPENTADIENE COMPOUNDS AND METALLOCENES<br/>[FR] SYNTHÈSE DE COMPOSÉS DE CYCLOPENTADIÈNE SUBSTITUÉS ET DE MÉTALLOCÈNES
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2020068420A1
公开(公告)日:2020-04-02
A method of synthesizing a substituted cyclopentadiene compound. The synthesis comprises a step of cyclizing, in the presence of a phosphorous pentoxide/methanesulfonic acid reagent, an alpha,beta-unsaturated carboxylic acid, cycloalkyl ester compound to make a substituted cyclopentenone compound, and converting the substituted cyclopentenone compound to the substituted cyclopentadiene compound. Also, a method of synthesizing a substituted metallocene compound comprising a metal-(substituted cyclopentadienyl ligand) complex, wherein the substituted cyclopentadienyl ligand is made from the substituted cyclopentadiene compound. A metal-(substituted cyclopentadienyl ligand) complex and substituted metallocene compound made by the method and a substituted metallocene catalyst made therefrom.
[EN] SYNTHESIS OF CYCLOPENTENONES<br/>[FR] SYNTHÈSE DE CYCLOPENTÉNONES
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2020068419A1
公开(公告)日:2020-04-02
A method comprising synthesizing a substituted cyclopentenone compound via reaction of a substituted cycloalkyl acrylate ester in the presence of phosphorous pentoxide/methanesulfonic acid reagent to make the substituted cyclopentenone compound.
Palladium-Catalyzed Intramolecular Oxidative Heck Cyclization and Its Application toward a Synthesis of (±)-β-Cuparenone Derivatives Supported by Computational Studies
oxidative cyclization of substituted homoallylic alcohols to form cyclic keto compounds under palladium-catalyzed conditions is described. The reaction has practical applications in the synthesis of sesquiterpenes. The mechanism of cyclization, the key step in the tandemreaction, was analyzed by using density functional theory calculations. A novel and efficient intramolecular oxidative cyclization of substituted
Palladium-catalyzed tandem oxidative cyclization of 1-bromohexa-1,5-dien-3-ols: easy access to cyclopentenones
作者:Sajal Kanti Mal、Devalina Ray、Jayanta K. Ray
DOI:10.1016/j.tetlet.2003.10.180
日期:2004.1
The novel Pd-catalyzed tandem cyclization of 1-bromohexa-1,5-dien-3-ols, prepared from the corresponding β-bromo-vinylaldehydes to cyclopentenone derivatives has been developed.