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A novel photochemical reaction of 4‐bromo‐3‐methyl‐1‐phenyl‐4,5‐dihydro‐pyrazol‐5‐one
Author(s) -
XiaoLiu L. I.,
Song ZhiYi,
Meng JiBen
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040221033
Subject(s) - chemistry , phenanthrene , naphthalene , photochemistry , irradiation , electron transfer , medicinal chemistry , reaction mechanism , organic chemistry , catalysis , physics , nuclear physics
UV‐Irradiation of 4‐bromo‐3‐methyl‐l‐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 1 occurred to form 2 or 2 and 3, respectively.