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

✍ Scribed by Biswanath Das; Malampati Srilatha; Boyapati Veeranjaneyulu; Boddu Shashi Kanth

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: German
• Weight: 143 KB
• Volume: 94
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.201000354

✦ Synopsis

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(Bu~3~Sn)~2~O~4~)]~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.