3,3-二甲基环丙烯 、 alkaline earth salt of/the/ methylsulfuric acid 在
silica gel 作用下,
以
正戊烷 为溶剂,
反应 4.0h,
以2.5%的产率得到6,6-dimethyl-3-phenylbicyclo<3.1.0>hex-2-en-4-one
参考文献:
名称:
Reactions of [2+2+1]-cycloaddition with the participation of cyclopropenes and dicobalt hexacarbonyl complexes of acetylenes
摘要:
The reaction of dicobalt hexacarbonyl complexes of acetylene and its phenyl and dimethyl derivatives with the methyl ester of 1-methyl-2-(trimethylsilyl)-1-cyclopropene-3-carboxylic acid with adsorption on a silica gel or NaX zeolite surface leads to the formation of a mixture of bicyclo[3.1.0]hex-2-en-4-one and tricyclo[4.1.0.0(2, 4)]heptan-5-one derivatives, whereby the yields and the composition of products are dependent on the type of the adsorbent. It has been found that under the reaction conditions partial isomerization of the bicyclo[3.1.0]hex-2-en-4-one derivatives into substituted phenols occurs. Action of anhydrous KF and crown-ether in acetonitrile on the bicyclo[3.1.0]hex-2-en-4-one derivatives in acetonitrile leads to protodesilylation.
Reactions of [2+2+1]-cycloaddition with the participation of cyclopropenes and dicobalt hexacarbonyl complexes of acetylenes
作者:S. L. Kireev、V. A. Smit、B. I. Ugrak、O. M. Nefedov
DOI:10.1007/bf00961045
日期:1991.11
The reaction of dicobalt hexacarbonyl complexes of acetylene and its phenyl and dimethyl derivatives with the methyl ester of 1-methyl-2-(trimethylsilyl)-1-cyclopropene-3-carboxylic acid with adsorption on a silica gel or NaX zeolite surface leads to the formation of a mixture of bicyclo[3.1.0]hex-2-en-4-one and tricyclo[4.1.0.0(2, 4)]heptan-5-one derivatives, whereby the yields and the composition of products are dependent on the type of the adsorbent. It has been found that under the reaction conditions partial isomerization of the bicyclo[3.1.0]hex-2-en-4-one derivatives into substituted phenols occurs. Action of anhydrous KF and crown-ether in acetonitrile on the bicyclo[3.1.0]hex-2-en-4-one derivatives in acetonitrile leads to protodesilylation.