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.
Cyclodimerizations of Alkyl Styryl Ketones and Their Silyl Enol Ethers by Use of Iron Carbonyls
作者:Tatsuo Ueda、Yoshio Otsuji
DOI:10.1246/cl.1986.1635
日期:1986.9.5
The reaction of alkyl styryl ketones with Fe3(CO)12 gives 3-acyl-4,5-diphenylcyclohexanones in a manner of [2+4] cyclodimerization. (η4-Enone)Fe(CO)3 complexes serve as catalyst for this reaction. Silylenolethers of the same ketones afford 4-acyl-3,5-diphenylcyclohexanones in the different type of [2+4] cyclodimerization upon treatment with Fe3(CO)12.