Synthetic Communications®

Efficient, solvent-free, microwave-enhanced condensation of 5, 5-dimethyl-1, 3-cyclohexanedione with aldehydes and imines using libr as inexpensive, mild catalyst

D Kumar, JS Sandhu

文献索引：Kumar, Dhruva; Sandhu, Jagir S. Synthetic Communications, 2010 , vol. 40, # 4 p. 510 - 517

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被引用次数: 24

摘要

Efficient, solvent-free, microwave-enhanced condensation of 5, 5-dimethyl-1, 3- cyclohexanedione with aldehydes using LiBr as catalyst affords xanthenediones. Imines gave only bis-5, 5-dimethyl-1, 3-cyclohexanediones at high power; a slightly longer period gave xanthenediones. In both types of reactions, the products are obtained in very good to excellent yields. The present protocol is inexpensive and ecofriendly.