Condensation of fluorosubstituted benzaldehydes with amines and cyclic 1,3-diketones
摘要:
Condensation of fluorosubstituted benzaldehydes with 2-naphthyl or 6-quinolylamine and cyclic beta-diketones (,3-cyclohexanedione, dimedone, and 1,3-indandione) provided new fluoroderivatives of benzo[a]acridine, 4,7-phenanthroline, and benzo[f]indeno[1,2-b]quinoline. Forming in the course of the reaction fluorophenylmethylene-2-naphthyl-(or 6-quinolyl)amines, arylbis(cyclohexane-1,3-dion-2-yl)methanes, and 2-(fluorophenylmethylene)- 1,3-indandiones were isolated.
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.