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Auto-Redox Reaction:  Tin(II) Chloride-Mediated One-Step Reductive Cyclization Leading to the Synthesis of Novel Biheterocyclic 5,6-Dihydro-quinazolino[4,3-b]quinazolin-8-ones with Three-Point Diversity

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journal contribution
posted on 06.01.2006 by Abhijeet Deb Roy, Arunachalam Subramanian, Raja Roy
A tin(II) chloride-mediated short, efficient, and practical regioselective synthesis of biheterocyclic 5,6-dihydro-quinazolino[4,3-b]quinazolin-8-ones with three-point diversity is reported. A one-step reductive transformation of 2-(2-nitrophenyl)-3H-quinazolin-4-one in various alcohols furnished the desired tetracyclic product in good yields with high purity.