Type: Article
One-pot three-component synthesis of pyrano [3,2- b ]pyrazolo[4,3- e ]pyridin-8(1 H)-ones
Journal: ACS Combinatorial Science (21568952)Year: 11 March 2013Volume: 15Issue: Pages: 141 - 146
Safaei S.Mohammadpoor Baltork I.a Khosropour A.R.Moghadam M.aTangestaninejad S.aMirkhani V.a Khavasi H.R.
DOI:10.1021/co3001204Language: English
Abstract
An efficient one-pot synthesis of novel pyrano[3,2-b]pyrazolo[4,3-e] pyridin-8(1H)-ones via three-component condensation of kojic acid, 1-H-pyrazol-5-amines and aldehydes in the presence of a catalytic amount of Zn(OTf)2 followed by H2O2-mediated oxidation is reported. Furthermore, the synthesis of 1′H-spiro[indoline-3,4′- pyrano[2,3-b]pyrazolo[3,4-e]pyridine]-2,8′(9′H)-diones were chosen for the library validation. © 2013 American Chemical Society.