Synthesis of polyfluorinated 4-phenyl-3,4-dihydroquinolin-2-ones and quinolin-2-ones via superacidic activation of N-(polyfluorophenyl)cinnamamides
摘要:
The cyclization reactions of a series of polyfluorocinnamanilides in triflic acid (CF3SO3H) yield 4-phenyl-3,4-dihydi-oquinolin-2-ones, which include a polyfluorinated benzene moiety as a part of the quinoline scaffold. These compounds undergo dehydrophenylation in the presence of AlCl3 to give the Corresponding polyfluoroquinolin-2-ones which are converted into polyfluorinated 2-chloroquinolines on treatment with POCl3. A mechanism for the cyclization reaction presuming the intermediacy of a superelectrophilic O,C-diprotonated form of the starting material is suggested. (C) 2009 Elsevier Ltd. All rights reserved.
DOI:
10.1016/j.tetlet.2009.07.013
作为产物:
描述:
4-bromo-3,5-difluoroanilide of cinnamic acid 在
三氟甲磺酸 作用下,
以65%的产率得到6-bromo-5,7-difluoro-4-phenyl-3,4-dihydroquinolin-2-one
参考文献:
名称:
Synthesis of polyfluorinated 4-phenyl-3,4-dihydroquinolin-2-ones and quinolin-2-ones via superacidic activation of N-(polyfluorophenyl)cinnamamides
摘要:
The cyclization reactions of a series of polyfluorocinnamanilides in triflic acid (CF3SO3H) yield 4-phenyl-3,4-dihydi-oquinolin-2-ones, which include a polyfluorinated benzene moiety as a part of the quinoline scaffold. These compounds undergo dehydrophenylation in the presence of AlCl3 to give the Corresponding polyfluoroquinolin-2-ones which are converted into polyfluorinated 2-chloroquinolines on treatment with POCl3. A mechanism for the cyclization reaction presuming the intermediacy of a superelectrophilic O,C-diprotonated form of the starting material is suggested. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of polyfluorinated 4-phenyl-3,4-dihydroquinolin-2-ones and quinolin-2-ones via superacidic activation of N-(polyfluorophenyl)cinnamamides
作者:Larisa Yu. Safina、Galina A. Selivanova、Konstantin Yu. Koltunov、Vitalij D. Shteingarts
DOI:10.1016/j.tetlet.2009.07.013
日期:2009.9
The cyclization reactions of a series of polyfluorocinnamanilides in triflic acid (CF3SO3H) yield 4-phenyl-3,4-dihydi-oquinolin-2-ones, which include a polyfluorinated benzene moiety as a part of the quinoline scaffold. These compounds undergo dehydrophenylation in the presence of AlCl3 to give the Corresponding polyfluoroquinolin-2-ones which are converted into polyfluorinated 2-chloroquinolines on treatment with POCl3. A mechanism for the cyclization reaction presuming the intermediacy of a superelectrophilic O,C-diprotonated form of the starting material is suggested. (C) 2009 Elsevier Ltd. All rights reserved.