A Novel Photochemical Reaction of 4-Bromo-3-methyl-1-phenyl-4,5-dihydro-pyrazol-5-one  

作　　者：李小六 宋志毅 孟继本 

机构地区：[1]Department of Chemistry, Hebei University, Baoding, Hebei 071002, China [2]Department of Chemistry, Nankai University, Tianjin 300071, China

出　　处：《Chinese Journal of Chemistry》2004年第10期1215-1218,共4页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (No. 20072018).

摘　　要：UV-Irradiation of 4-bromo-3-methyl-1-phenyl-4,5-dihydro-pyrazol-5-one (1) in the presence of various aromatic hydrocarbons gave different types of photoproducts; depending on the nature of the hydrocarbons via an electron-transfer mechanism. In the presence of naphthalene or phenanthrene a photochemical homocoupling reaction of I occurred to form 2 or 2 and 3, respectively.UV-Irradiation of 4-bromo-3-methyl-1-phenyl-4,5-dihydro-pyrazol-5-one (1) in the presence of various aromatic hydrocarbons gave different types of photoproducts; depending on the nature of the hydrocarbons via an electron-transfer mechanism. In the presence of naphthalene or phenanthrene a photochemical homocoupling reaction of I occurred to form 2 or 2 and 3, respectively.

关 键 词：photocoupling PYRAZOLONE EXCIPLEX electron-transfer mechanism 

分 类 号：O621[理学—有机化学]