Practical and high stereoselective synthesis of 3-(arylmethylene)isoindolin-1-ones from 2-formylbenzoic acid
摘要:
Practical and high stereoselective synthesis of 3-(arylmethylene)isoindolin-1-ones is reported. The synthetic method involves the preparation of dimethyl isoindolin-1-one-3-yl-phosphonates by a 'one-pot' three-component reaction of 2-formylbenzoic acid with 4-methoxybenzylamine or aminoacetaldehyde dimethyl acetal and dimethyl phosphite under solvent and catalyst free-conditions, followed by a Horner reaction with several aryl aldehydes. (C) 2012 Elsevier Ltd. All rights reserved.
Dichotomous Control of<i>E</i>/<i>Z</i>-Geometry in Intramolecular Cyclization of<i>o</i>-Alkynylbenzamide Derivatives Catalyzed by Organic Superbase P4-<i>t</i>Bu in the Presence/Absence of Water
作者:Chikashi Kanazawa、Masahiro Terada
DOI:10.1002/asia.200900342
日期:2009.11.2
it! An intramolecularcyclization reaction of o‐alkynylbenzamides that allows dichotomouscontrol of E/Z‐geometry has been developed using an organicsuperbase, P4‐tBu, as a catalyst. The presence/absence of water along with the use of an organicsuperbase provides the necessary control of the geometry at the exo‐double bond. The method enables efficient access to isoindolinone derivatives, an important
E / Z 做到了!邻炔基苯甲酰胺的分子内环化反应可实现E / Z几何形状的二分控制,已使用有机超碱P4- t Bu作为催化剂进行了开发。水的存在与否以及有机超碱的使用为exo- double键的几何形状提供了必要的控制。该方法能够有效利用异吲哚啉酮衍生物,这是一类重要的生物活性分子。