Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 77, Issue 9, Pages 4438-4444Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo3003024
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- DST, New Delhi
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The catalytic efficiency of mixed Cu(I)-Cu(II) system in situ generated by partial reduction of CuSO4 with glucose in ethanol (nonanhydrous) under open air has been explored. With this catalysis, the multicomponent cascade reaction of A(3)-coupling of heterocyclic amidine with aldehyde and alkyne, 5-exo-dig cycloisomerization, and prototropic shift has afforded an efficient and eco-friendly synthesis of therapeutically important versatile N-fused imidazoles. Diverse heterocyclic amidines, several of which are known to be poorly reactive, and aldehydes are compatible in this catalytic process.
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