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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
Author(s) -
Das Biswanath,
Srilatha Malampati,
Veeranjaneyulu Boyapati,
Shashi Kanth Boddu
Publication year - 2011
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201000354
Subject(s) - molybdenum , chemistry , tungsten , catalysis , polymer , tungsten compounds , dihydropyridine , combinatorial chemistry , polymer chemistry , organic chemistry , calcium
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.