2742
M. Kidwai and S. Saxena
6. Kidwai, M.; Mohan, R. Neat reaction microwave technology for the synthesis of
N-substituted-1,4-dihydropyridines. Can. J. Chem. 2004, 82, 427–429.
7. Varma, R. S. Solvent-free organic synthesis using supported reagents and
microwave irradiation. Green Chem. 1999, 1 (1), 43–55.
8. Orru, R. V.; de Greef, M. Synthesis 2003, 1471–1499.
9. Syamala, M. A decade of advances in three component reactions: A review. Org.
Prep. Proced. Int. 2005, 37, 103–171.
10. Feuer, G. Metabolism and biological actions of coumarins. Prog. Med. Chem.
1974, 10, 85–158.
11. Obaseki, A. O.; Porter, W. R. 4-Hydroxycoumarin/2-hydroxychromone tauto-
merism: Infrared spectra of 2-13C and 3-D labeled 4-hydroxycoumarin and its
anion. J. Heterocycl. Chem. 1982, 19, 385–390.
12. Gupta, A. K. D.; Chatterjee, R. M.; Das, K. R. A facile one step synthesis of
4-hydroxycoumarin. Indian J. Chem. 1981, 20B, 511.
13. Hermodson, M. A.; Barker, W. M.; Link, K. P. Studies on the 4-
hydroxycoumarins: Synthesis of the metabolites and some other derivatives of
Warfarin. J. Med. Chem. 1971, 14 (2), 167–169.
14. Georgiadis, M. P.; Couladouros, E. A.; Delitheos, A. K. Synthesis and antimicro-
bial properties of 2H-pyran-3(6H)-one derivatives and related compounds.
J. Pharm. Sci. 1992, 81 (11), 1126–1131.
15. Mohr, S. J.; Chirigos, M. A.; Smith, G. T.; Fuhrman, F. S. Specific potentiation of
L1210 vaccine by pyran copolymer. Cancer Res. 1976, 36 (6), 2035–2039.
16. Ermili, A.; Roma, G.; Buonamici, M.; Cuttica, A.; Galante, M.; Orsini, G.;
Passerini, N. Psychopharmacological study with K8409, a 1H-naptho[2,1-b] pyran-
3-dialkylamino substituted derivative. Farmaco Ed. Sci. 1979, 34 (6), 535–544.
17. Bargagna, A.; Longobardi, M.; Mariani, E.; Schenone, P.; Losusso, C.;
Esposito, G.; Falzarano, C.; Marmo, E. Reaction of ketenes with N,N-disubstituted
a-aminomethyleneketones 2H,5H-[1H]benzothiopyrano[4,3-b]pyran derivatives
with platlet antiaggregating activity. Farmaco 1990, 45 (4), 405–413.
18. Kidwai, M.; Saxena, S.; Khan, M. K. R.; Thukral, S. S. Aqua mediated synthesis of
substituted 2-amino-4H-chromenes and in vitro study as antibacterial agents.
Bioorg. Med. Chem. Lett. 2005, 15, 4295–4298.
19. Kidwai, M.; Venkataramanan, R.; Dave, B. Solvent-free synthesis of thiohydan-
toin over K2CO3. Green Chem. 2001, 3 (6), 278–279.
20. (a) Kidwai, M.; Mohan, R.; Rastogi, S. Alumina catalyzed synthesis of fused
thioxopyrimidine derivatives under microwave. Synth. Commun. 2003, 33 (21),
3747–3759; (b) Kidwai, M.; Sapra, P. An efficient synthesis of benzopyranopyri-
midines using inorganic solid support. Synth. Commun. 2002, 32 (11), 1639–1645.
21. Shaker, R. M. Synthesis and reactions of some new 4H-pyrano[3,2-c]
benzpyran-5-one derivatives and their potential biological activities. Pharmazie
1996, 51, 148.
22. El-Agrody, A. M.; Abd. El-Lalif, A. M. S.; Fakery, A. H.; Bedair, A. H. Hetero-
aromatization with 4-hydroxycoumarin: Synthesis of some new pyranocoumarins
and coumarinopyranopyrimidines. J. Chem. Res., Synop. 2000, 26–27.
23. Cohn, O. M.; Narine, B.; Tarmowski, B. A versatile new synthesis of quinolines
and related fused pyridines: The synthesis of 2-chloroquinoline-3-carbaldehydes.
J. Chem. Soc., Perkin Trans. 1 1981, 1520–1530.
24. Yakout, E. M. A.; Ibrahim, N. M.; Ghoneim, K. M.; Mahran, M. R. H. Reactions of
4-hydroxycoumarin and 4-hydroxyfurocoumarins with a,b-unsaturated nitriles:
Mass spectrometry of the new g-pyrano-a-pyran derivatives. J. Chem. Res.,
Synop. 1999, 652–653.