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

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2004,（10）
• 页码范围: 1215-1218
• 页数: 4页
• 语种: 英文

摘要

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.