A General Synthesis of Novel Quinoline-Based Isoindolin-1-one Derivatives
摘要:
A simple and general one-pot protocol for the synthesis of a series quinoline-based isoindolin-l-ones, namely 7-chloro-2-substituted-2,3-dihydro-1H-pyrrolo[3,4-b]quinolin-l-ones (5a-p) is described, involving a cascade Williamson-type condensation reaction of ethyl 6-chloro-2-(chloromethyl)quinoline-3-carboxylate (3) with aromatic amines (4 a-i), aliphatic amines (4j-m) and aliphatic diamines (4n-p) and subsequent intramolecular C-N bond cyclization of the resulting intermediates in refluxing EtOH-AcOH (v/v, 10:1) solvent system in a single synthetic operation.
A General Synthesis of Novel Quinoline-Based Isoindolin-1-one Derivatives
摘要:
A simple and general one-pot protocol for the synthesis of a series quinoline-based isoindolin-l-ones, namely 7-chloro-2-substituted-2,3-dihydro-1H-pyrrolo[3,4-b]quinolin-l-ones (5a-p) is described, involving a cascade Williamson-type condensation reaction of ethyl 6-chloro-2-(chloromethyl)quinoline-3-carboxylate (3) with aromatic amines (4 a-i), aliphatic amines (4j-m) and aliphatic diamines (4n-p) and subsequent intramolecular C-N bond cyclization of the resulting intermediates in refluxing EtOH-AcOH (v/v, 10:1) solvent system in a single synthetic operation.
Lithium triflate (LiOTf): a highly efficient and reusable catalytic system for the synthesis of diversified quinolines under neat conditions
作者:Amol B. Atar、Someshwer D. Dindulkar、Yeon Tae Jeong
DOI:10.1007/s00706-012-0906-2
日期:2013.5
A series of diverse polyfunctionalized quinolines were easily prepared in excellent yields via a Friedlander reaction of o-aminoaryl ketone or o-aminoaryl aldehyde with alpha-methylene ketones using lithium triflate as an expeditious catalyst under solvent free conditions. The protocol provides a practical and straightforward approach toward highly functionalized quinoline derivatives in excellent yields. The catalyst is easily recoverable and less sensitive to moisture, which makes this protocol more advantageous.