通过N-芳烯萘-2-胺与1,3-二羰基化合物的反应,可以高效合成苯并[ a ] r啶和茚并[1,2- b ]苯并[ f ]喹啉。三乙基苄基氯化铵(TEBAC)在水性介质中。通过光谱数据确定结构,并通过X射线分析进一步确认。该方法具有许多优点,例如中性条件,高收率和简单的后处理程序。另外,选择水作为绿色和可循环使用的溶剂。
The first example of glucose-containing Brønsted acid synthesis and catalysis: efficient synthesis of tetrahydrobenzo[α]xanthens and tetrahydrobenzo[α]acridines in water
Glucose sulfonic acid (GSA) was synthesized for the first time and used as an efficient catalyst for the preparation of tetrahydrobenzo[alpha]xanthens and tetrahydrobenzo[alpha]acridines via the reaction of aromatic aldehydes, 2-naphthol (or beta-naphthylamine), and dimedone in water. Up to four new bonds and one new ring were formed in one-pot with water as the only by-product in these two reactions. The work opens up a new and efficient synthesis and application of sugar-containing Bronsted acid. (C) 2013 Elsevier Ltd. All rights reserved.