Molybdenum‐ and Tungsten‐Based Coordination Polymers as Catalysts for an Efficient and Rapid Synthesis of Hexahydro‐5‐oxoquinoline‐3‐carboxylates and 1,4‐Dihydropyridine‐3,5‐dicarboxylates |
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| Authors: | Biswanath Das Malampati Srilatha Boyapati Veeranjaneyulu Boddu Shashi?Kanth |
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| Institution: | 1. Organic Chemistry Division‐I, Indian Institute of Chemical Technology, Hyderabad‐500?007, India, (phone: +91‐40‐7193434;2. fax: +91‐40‐7160512) |
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| Abstract: | Hexahydro‐5‐oxoquinoline‐3‐carboxylates and 1,4‐dihydropyridine‐3,5‐dicarboxylates were synthesized efficiently and rapidly (2 min) in the presence of molybdenum‐ and tungsten‐based coordination polymers M(Bu3Sn)2O4)]n (M=Mo or W) as catalysts (Schemes 1 and 2; Tables 2 and 3). The products were formed at room temperature in excellent yields (90–98%). The catalysts worked under heterogeneous conditions and were recyclable. The earlier reports for the application of these polymers to conduct organic synthesis are limited. The present method explores a new and useful application of these catalysts. |
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| Keywords: | Molybdenum complexes Tungsten complexes Quinoline‐3‐carboxylates hexahydro‐5‐oxo‐ Pyridine‐3 5‐dicarboxylates 1 4‐dihydro‐ Catalysis Multicomponent reactions |
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