Iron Trichloride-Promoted Cyclization of o-Alkynylaryl Isocyanates: Synthesis of 3-(Chloromethylene)oxindoles
摘要:
Iron trichloride promotes the cationic cyclization of o-(arylethynyl)aryl isocyanates leading to 3-(arylchloromethylene)oxindoles which can be stereoselectively converted to (2)-3-(aminomethylene)ox in doles under straightforward conditions. When the alkyne is substituted by an alkyl group, activation of the allylic C-H bond also occurs producing 1,2-(dichloroalkylidene)oxindoles.
Iron Trichloride-Promoted Cyclization of o-Alkynylaryl Isocyanates: Synthesis of 3-(Chloromethylene)oxindoles
摘要:
Iron trichloride promotes the cationic cyclization of o-(arylethynyl)aryl isocyanates leading to 3-(arylchloromethylene)oxindoles which can be stereoselectively converted to (2)-3-(aminomethylene)ox in doles under straightforward conditions. When the alkyne is substituted by an alkyl group, activation of the allylic C-H bond also occurs producing 1,2-(dichloroalkylidene)oxindoles.
Iron Trichloride-Promoted Cyclization of <i>o</i>-Alkynylaryl Isocyanates: Synthesis of 3-(Chloromethylene)oxindoles
作者:Guillaume Cantagrel、Benoît de Carné-Carnavalet、Christophe Meyer、Janine Cossy
DOI:10.1021/ol9014877
日期:2009.10.1
Iron trichloride promotes the cationic cyclization of o-(arylethynyl)aryl isocyanates leading to 3-(arylchloromethylene)oxindoles which can be stereoselectively converted to (2)-3-(aminomethylene)ox in doles under straightforward conditions. When the alkyne is substituted by an alkyl group, activation of the allylic C-H bond also occurs producing 1,2-(dichloroalkylidene)oxindoles.