A one-pot four-component reaction of an aliphatic or aromatic amine, diketene, an aromatic aldehyde and 1,3-diphenyl-1H-pyrazol-5-amine in the presence of p-toluenesulfonic acid as a catalyst has been developed. In this reaction, a new class of fully substituted pyrazolo[3,4-b]pyridine-5-carboxamide derivatives is produced under mild reaction conditions and in good yields at ambient temperature. (C) 2009 Published by Elsevier Ltd.
机构:
Vijayanagara Sri Krishnadevaraya Univ, Dept Studies & Res Chem, Bellary 583105, Karnataka, IndiaVijayanagara Sri Krishnadevaraya Univ, Dept Studies & Res Chem, Bellary 583105, Karnataka, India
Hegde, Subramanya Gopal
Koodlur, Lokesh
论文数: 0引用数: 0
h-index: 0
机构:
Vijayanagara Sri Krishnadevaraya Univ, Dept Studies & Res Chem, Bellary 583105, Karnataka, IndiaVijayanagara Sri Krishnadevaraya Univ, Dept Studies & Res Chem, Bellary 583105, Karnataka, India
Koodlur, Lokesh
Narayanarao, Manjunatha
论文数: 0引用数: 0
h-index: 0
机构:
Visvesvaraya Technol Univ, East Point Coll Engn & Technol, Bangalore, Karnataka, IndiaVijayanagara Sri Krishnadevaraya Univ, Dept Studies & Res Chem, Bellary 583105, Karnataka, India