InBr<sub>3</sub>-Promoted Divergent Approach to Polysubstituted Indoles and Quinolines from 2-Ethynylanilines: Switch from an Intramolecular Cyclization to an Intermolecular Dimerization by a Type of Terminal Substituent Group
Use of a 2-ethynylaniline having an alkyl or aryl group on the terminal alkyne selectively produced a variety of polyfunctionalized indole derivatives in moderate to excellent yields via indium-catalyzed intramolecular cyclization of the corresponding alkynylaniline. In contrast, employment of a substrate with a trimethylsilyl group or with no substituent group on the terminal triple bond, exclusively
A direct anionic cyclization of 2-alkynylbenzonitrile to 3-substituted-1(2H)-isoquinolones and 3-benzylideneisoindol-2-ones initiated by methoxide addition
作者:Ming-Jung Wu、Li-Juan Chang、Li-Mei Wei、Chi-Fong Lin
DOI:10.1016/s0040-4020(99)00812-1
日期:1999.11
2-(2-alkylethynyl)benzonitrile with sodium methoxide in refluxing methanol for 12 h gave 3-alkyl-1(2H)-isoquinolone in modest yield. Under the same reaction conditions, methanolysis of 2-(2-arylethynyl)benzonitrile lead to the formation of 3-alkylidene isoindol-1-one. Partial hydrolysis of 2-(1-hexynyl)benzonitrile to the corresponding benzamide, followed by treatment of the benzamide with sodium methoxide
An efficient C-H/N-H functionalization with allenes was enabled via versatile electro-oxidative cobaltcatalysis. Thus, electrochemicalC-H activations were accomplished with high levels of chemoselectivity and regioselectivity in an operationally simple undivided cell setup. The user-friendly nature of this protocol was highlighted by excellent functional group tolerance, an electro-reductive removable
Derivatives of isoquinolinone and dihydrolisoquinolinone, and related compounds, and their use as pharmaceuticals in the treatment of a disease by inhibition of the enzyme poly(ADP-ribose)polymerase (“PARP”) are disclosed.