Synthesis of some novel annulated pyrido[2,3-d]pyrimidines via stereoselective intramolecular hetero Diels–Alder reactions of 1-oxa-1,3-butadienes

• Mohit L. Deb and
• Pulak J. Bhuyan

Beilstein J. Org. Chem. 2010, 6, No. 11, doi:10.3762/bjoc.6.11

• ], antihypertensive [13], bronchiodilator [15] and vasodilator [16] properties. Additionally, some compounds of this type exhibit antialergic [17], antimalarial [18], analgesic [19][20] and antifungal [21] activity. Consequently, much effort has been directed towards the synthetic manipulation of uracil for the