Regioselective Synthesis of
Chromeno[4′,3′:4,5]pyrano[3,2-c][1,8]naphthyridin-13-one
Derivatives by Domino Knoevenagel-Hetero-Diels-Alder Reactions
K. C. Majumdar*a,b, Abu Tahera, Sudipta Ponraa a Department of Chemistry, University of Kalyani, Kalyani 741235,
W.B, India b Department of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028,
Assam, India Fax: +91(33)25828282; e-Mail: kcm_ku@yahoo.co.in;