- Cyclization of Substituted 5-Hexenyl Radicals as a Model for Photocyclization of 1,5-Hexadien-3-ones
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An examination of substituent effects upon the photochemistry of a number of 1,5-hexadien-3-ones reveals a close parallel with those observed in the cyclization of 5-hexenyl radicals and permits for the first time a rationalization for variations in the regiospecificity of the intramolecular cycloaddition reactions of these dienones.
- Agosta, William C.,Wolff, Steven
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- Dichloromethane activation. Direct methylenation of ketones and aldehydes with CH2Cl2 promoted by Mg/TiCl4/THF
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(Chemical Equation Presented) This Mg-TiCl4-promoted CH 2-transfer reaction of CH2Cl2 represents an extremely simple, practical, and efficient methylenation of a variety of ketones and aldehydes, especially in enolizable or sterically hindered ketones such as 2,2-dimethylcyclohexanone, camphor, and fenchone.
- Yan, Tu-Hsin,Tsai, Chia-Chung,Chien, Ching-Ting,Cho, Chia-Ching,Huang, Pei-Chen
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p. 4961 - 4963
(2007/10/03)
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- Regiochemical Control in Intramolecular Photochemical Reactions of 1,5-Hexadien-3-ones and 1-Acyl-1,5-hexadienes
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Both 1,5-hexadien-3-ones (7) and 1-acyl-1,5-hexadienes (8) generally undergo intramolecular photochemical cyclization by way of 1,5 (crossed) closure (see 2), as do other derivatives of 1,5-hexadienes (1).Through study of the photochemistry of 14 members
- Wolff, Steven,Agosta, William C.
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p. 1292 - 1299
(2007/10/02)
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