Dehydration of 1-substituted secondary and tertiary bicyclo[3.3.1]nonan-9-ols. A substituent-driven rearrangement to 4-substituted and/or angularly substituted hexahydroindenes
The triplex Diels-Alder reaction: intramolecular cycloaddition of phenyl-substituted alkenes to 1,3-dienes
摘要:
The triplex Diels-Alder reaction of dienes and styrene-like dienophiles that are covalently linked with a flexible alkyl chain was investigated. Sensitization with 9,10-dicyanoanthracene in benzene solution leads to good yields of [4 + 2] adducts when the diene is a derivative of cyclohexadiene and the linking chain contains two atoms. If the linking chain contains three atoms, dyotropic transfer of hydrogens occurs. When acyclic dienes are employed, it is believed that conformational isomers lead to mixtures containing considerable yields of both [4 + 2] and [2 + 2] cycloadducts.
Gold(<scp>i</scp>)-catalyzed dehydrogenative cycloisomerization of 1,5-enynes
作者:Gen-Qiang Chen、Wei Fang、Yin Wei、Xiang-Ying Tang、Min Shi
DOI:10.1039/c6cc05423d
日期:——
Gold(I)-catalyzed dehydrogenative cycloisomeriaztion of cyclopropane tethered 1,5-enynes proceeded smoothly to give multisubstituted benzene derivatives in good to excellent yields. Synthetically important benzocyclobutenes can be produced in high yields in the...
The triplex Diels-Alder reaction: intramolecular cycloaddition of phenyl-substituted alkenes to 1,3-dienes
作者:Ingrid Wolfle、Samantha Chan、Gary B. Schuster
DOI:10.1021/jo00026a023
日期:1991.12
The triplex Diels-Alder reaction of dienes and styrene-like dienophiles that are covalently linked with a flexible alkyl chain was investigated. Sensitization with 9,10-dicyanoanthracene in benzene solution leads to good yields of [4 + 2] adducts when the diene is a derivative of cyclohexadiene and the linking chain contains two atoms. If the linking chain contains three atoms, dyotropic transfer of hydrogens occurs. When acyclic dienes are employed, it is believed that conformational isomers lead to mixtures containing considerable yields of both [4 + 2] and [2 + 2] cycloadducts.
Dehydration of 1-substituted secondary and tertiary bicyclo[3.3.1]nonan-9-ols. A substituent-driven rearrangement to 4-substituted and/or angularly substituted hexahydroindenes
作者:Fabrizio Balata、Anna R. Dello Jacono、Augusto Gambacorta