Silicon-Induced Ene-Type Reaction in the Thermal Conversion of Enolates to β-Silyl Enones with Molecular Dioxygen
摘要:
Reaction of alkyl, acetoxy, and silyl enol ethers of 3-(organosilyl)cyclohexanone with molecular dioxygen in toluene at 110 degrees C produced the corresponding conjugated enones in yields up to 88% yield. The reaction of the same type failed on replacement of the silyl group at the C-3 position with an isopropyl group. These results indicate the existence of an unprecedented silicon-induced ene-type reaction. Its reaction mechanism, generality, limitations, and exceptions are discussed.
Enecarboxylation with diethyl oxomalonate as an enophilic equivalent of carbon dioxide. A synthesis of allylcarboxylic acids
作者:Mary F. Salomon、Simon N. Pardo、Robert G. Salomon
DOI:10.1021/ja00325a014
日期:1984.6
On prepare une serie d'acides carboxyliques allyliques a partir des olefines correspondantes par un processus en deux etapes equivalent a: 1) une reaction ene avec l'oxomalonate de diethyle conduisant a l'ester α-hydroxymalonique; 2) une bisdecarboxylation oxydante de ce dernier
在制备 une serie d'acides carboxyliques allyliques a partir des ocoxyliques par un processus en deux etapes 等价物 a: 1) une 反应 ene avec l'oxomalonate de diethyle conduisant a l'ester α-hydroxymalonique; 2) une bisdecarboxylation oxydante de ce dernier
Catalytic epoxidation of cyclic vinylsilanes by ruthenium(II) complexes under aerobic conditions
A new methodology has been developed for the catalyticepoxidation of cyclic vinylsilanes using a ruthenium(II) bisoxazoline complex 2 with molecular oxygen. An attempt has been made to understand the role of –SiMe3 group on the rate of epoxidation process.
Silicon-controlled oxidation of enol acetates to enones by electrochemical method
作者:Lung Ching Lin、Lu Lin Chueh、Shwu-Chen Tsay、Jih Ru Hwu
DOI:10.1016/0040-4039(95)00723-p
日期:1995.6
Anodic oxidation of β-silylcycloalkanone enol acetates 1a-d in glacial acetic acid containing tetraethylammonium p-toluenesulfonate afforded α,β-unsaturated β-silylcycloalkenones 2a-d exclusively in 81–95% yields. The silyl group in 1a-d directed the oxidation under electrochemical conditions.