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An Efficient synthesis of pyrimido[4,5-b]quinoline and indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidine derivatives via multicomponent reactions in ionic liquid

✍ Scribed by Shun-Jun Ji; Sai-Nan Ni; Fang Yang; Jing-Wen Shi; Guo-Lan Dou; Xiao-Yue Li; Xiang-Shan Wang; Da-Qing Shi

Publisher
Journal of Heterocyclic Chemistry
Year
2008
Tongue
English
Weight
728 KB
Volume
45
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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A series of pyrimido[4,5‐b]quinoline and indeno[2′,1′:5,6]pyrido[2,3‐d]pyrimidine derivatives were synthesized via the three‐component reaction of an aldehyde, 6‐aminopyrimidine‐2,4‐dione and 5,5‐dimethyl‐1,3‐cyclohexanedione or 1,3‐indanedione in ionic liquid 1‐n‐butyl‐3‐methylimidazolium bromide ([bmim]Br). This protocol has the advantages of easier work‐up, milder reaction conditions, high yields and an environmentally benign procedure compared with other methods.

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