Reactions with lithium dimethylcuprate and lithium dimethylaurate
作者:Gerd Hallnemo、Christina Ullenius
DOI:10.1016/s0040-4020(01)88572-0
日期:1983.1
The reaction of lithium dimethylcuprate with E-4-phenyl-3-buten-2-one in different solvents has been investigated. Fast conjugateaddition occurs in hydrocarbons, dichloromethane and diethylether, while the reaction is retarded in better coordinating solvents.
A Facile and Efficient Synthesis of Six-Membered Enol Carbocyclic Compounds
作者:De-Suo Yang、Zheng-Hui Guan、Sen Ke、Ming-Jin Fan、Hai-Tao Zhu、Xiao-Ling Wang
DOI:10.1055/s-0035-1560517
日期:——
A facile and efficient method for the synthesis of six-membered enol carbocyclic compounds was realized by intermolecular cyclization reaction of 3-aryllidenepentane-2,4-diones with t-BuOK in CH2Cl2. The reaction is conducted under mild conditions and shows good functional group tolerance.
UEDA TATSUO; OTSUJI YOSHIO, CHEM. LETT.,(1986) N 9, 1635-1638
作者:UEDA TATSUO、 OTSUJI YOSHIO
DOI:——
日期:——
Amine-catalyzed direct self Diels–Alder reactions of α,β-unsaturated ketones in water: synthesis of pro-chiral cyclohexanones
作者:D.B. Ramachary、Naidu S. Chowdari、Carlos F. Barbas
DOI:10.1016/s0040-4039(02)01500-9
日期:2002.9
Amine-catalyzed direct self Diels-Alder reactions of alpha, beta-unsaturated ketones have been developed. (S)-1-(2-Pyrrolidinyl-methyl)pyrrolidine, L-proline and pyrrolidine catalyzed the reaction of alpha,beta-unsaturated ketones to provide cyclohexanone derivatives with good yield (up to 80%) in a single step via in situ-generation of 2-amino-1,3-butadienes and iminium ion-activated enones. Pro-chiral cyclohexanones were selectively prepared with pyrrolidine catalysis in water. (C) 2002 Published by Elsevier Science Ltd.