References
- Sheldon , R. A. 1996 . Selective catalytic synthesis of fine chemicals: Opportunities and trends . J. Mol. Catal. , 107 : 75
- Tanaka , K. and Toda , F. 2000 . Solvent‐free organic synthesis . Chem. Rev. , 100 : 1025
- Choudhary , V. R. , Dhar , A. , Jana , P. , Jha , R. and Uphade , B. S. 2005 . A green process for chlorine‐free oxidation of benzyl alcohol with molecular oxygen over a supported nano‐size gold catalyst . Green Chem. , 7 : 768
- Deka , N. , Mariotte , A. M. and Boumendjel , A. A. 2001 . Microwave mediated solvent‐free acetylation of deactivated and hindered phenols . Green Chem. , 3 : 263
- Witte , E. C. , Neubert , P. and Roesoh , A. 7‐(Piperazinylpropoxy)‐2H‐1‐benzopyran‐2‐ones . Ger. Offen. DE 3427985 . 1986 . Chem. Abstr., 1986, 104, 224915f
- Hyama , T. and Saimoto , H. 1988 . Preparation of (furanyl) pentenylchromene derivatives as anticancer agents . Chem. Abstr. , 108 : 37645 Jpn. KoKai Tokkyo Koho, JP 62181276, 1987
- Wang , J. L. , Liu , D. , Zhang , Z. J. , Shan , S. , Han , X. , Srinivasula , S. M. , Croce , C. M. , Alnemri , E. S. and Huang , Z. Structure‐based discovery of an organic compound that binds Bet‐2 protein and induces apoptosis of tumor cells . Proc. Natl. Acad. Sci. USA. Vol. 97 , pp. 7124
- Martin , N. , Martin , G. , Secoane , A. C. , Marco , J. L. , Albert , A. and Cano , F. H. 1993 . Michael addition of malononitrile to a‐acetylcinnamanides . Liebigs. Ann. Chem. , 7 : 801
- Maco , J. L. , Martin , N. , Grau , A. M. , Seoane , C. , Albert , A. and Cano , F. H. 1994 . Development of methods for the synthesis of chiral, highly functionlized 2‐amino‐4‐aryl‐4H‐pyrans . Tetrahedron , 50 ( 11 ) : 3509
- Hatakeyama , S. , Ochi , N. , Numata , H. and Takano , S. 1988 . J. Chem. Soc., Chem. Commun. , : 1202
- Armetso , D. , Horspool , W. M. , Martin , N. , Ramos , A. and Seaone , C. 1989 . Synthesis of cyclobutenes by the novel photochemical ring contraction of 4‐substituted‐2‐amino‐3,5‐dicyano‐6‐phenyl‐4H‐pyrans . J. Org. Chem. , 54 : 3069
- Singh , K. , Singh , J. and Singh , H. 1996 . A synthetic entry into fused pyran derivatives through carbon transfer reactions of 1,3‐oxazinanes and oxazolidines with carbon nucleophiles . Tetrahedron , 52 : 14273
- Wang , X. S. , Shi , D. Q. , Tu , S. J. and Yao , C. S. 2003 . A convenient synthesis of 5‐oxo‐5,6,7,7‐tetradydro‐4H‐benzon‐[b]‐pyran derivatives catalyzed by KF‐alumina . Synth. Commun. , 33 : 119
- Wang , X. S. , Shi , D. Q. , Rong , L. C. , Yao , C. S. and Dai , G. Y. 2003 . Synthesis and crystal structure of 3‐methyl‐5‐cyano‐6‐amino‐1‐phenyl‐4‐(3,4‐dimethoxyphenyl)‐1,4‐dihydropyrano[2,3‐c]pyrazole . Jie Gou Hua Xue , 22 ( 3 ) : 331
- Ismail , Z. H. , Aly , G. M. , El‐Degwi , M. S. , Heiba , H. I. and Ghorab , M. M. 2003 . Synthesis and insecticidal activity of some new pyranopyrazoles, pyrazolopyranopyrimidines, and pyrazolopyranopyridines. Egyptian . J. Biotechnol. , 13 : 73
- Ipsita , D. and Pulak , J. B. 2004 . Sodium bromide catalysed one‐pot synthesis of tetrahydrobenzo[b]pyrans via a three‐component cyclocondensation under microwave irradiation and solvent‐free conditions . Tetrahedron Lett. , 45 : 8625
- Tu , S. J. , Miao , C. B. , Gao , Y. , Feng , Y. J. and Feng , J. G. 2002 . Microwave‐prompted reaction of cinnamonitrile derivatives with 5,5‐dimethyl‐1,3‐cyclohexanedione . Chin. J. Chem. , 20 : 703
- Zhou , J. F. , Tu , T. J. , Gao , Y. and Ji , M. 2001 . One pot synthesis of pyrans and pyrano[2,3‐c]pyrazole derivatives under microwave irradiation . Chin. J. Org. Chem. , 21 ( 10 ) : 742
- Tu , S. J. , Gao , Y. , Guo , C. , Shi , D. Q. and Lu , Z. S. 2002 . A convenient synthesis of 2‐amino‐5,6,7,8‐tetrahydro‐5‐oxo‐4‐aryl‐7,7‐dimethyl‐4H‐benzo‐[b]‐pyran‐3‐carbonitrile under microwave irradiation . Synth. Commun. , 32 ( 14 ) : 2137
- Zhou , J. F. , Tu , S. J. , Zhu , H. Q. and Zhi , S. J. 2002 . A facile one pot synthesis of pyrano[2,3‐c] pyrazole derivatives under microwave irradiation . Synth. Commun. , 32 ( 21 ) : 3363
- Li , J. T. , Xu , W. Z. , Yang , L. C. and Li , T. S. 2004 . One‐pot synthesis of 2‐amino‐4‐aryl‐3‐carbalkoxy‐7,7‐dimethyl‐5,6,7,8‐tetrahydro‐benzo[b]pyran derivatives catalyzed by KF/basic Al2O3 under ultrasound irradiation . Synth. Commun. , 34 : 4565
- Jin , T. S. , Wang , A. Q. , Wang , X. , Zhang , J. S. and Li , T. S. 2004 . A clean one‐pot synthesis of tetrahydrobenzo[b]pyran derivatives catalyzed by hexadecyltrimenthylammonium bromide in aqueous media . Synlett. , : 871
- Jin , T. S. , Wang , A. Q. , Cheng , Z. L. , Zhang , J. S. and Li , T. S. 2005 . A clean and simple synthesis of 6‐amino‐4‐aryl‐5‐cyano‐3‐methyl‐1‐phenyl‐1,4‐dihydropyrano[2,3‐c]pyrazole in water . Synth. Commun. , 35 : 137
- Shi , D. Q. , Mou , J. , Zhuang , Q. Y. and Wang , X. S. 2004 . One‐pot synthesis of 2‐amino‐4‐aryl‐5‐oxo‐5,6,7,8‐tetrahydro‐4H‐1‐benzopyran‐3‐carbonitriles in aqueous media . J. Chem. Res. , 12 : 821
- Shi , D. Q. , Zhang , Z. , Zhuang , Q. Y. , Tu , S. J. and Hu , H. W. 2003 . Clean synthesis of 2‐amino‐3‐cyano‐4‐aryl‐7,7‐dimethyl‐5‐oxo‐4H‐5,6,7,8‐tetra hydrobenzo[b]pyran in water . Chin. J. Org. Chem. , 23 ( 8 ) : 877
- Shi , D. Q. , Mou , J. , Zhuang , Q. Y. , Niu , L. H. , Wu , N. and Wang , X. S. 2004 . Three‐component one‐pot synthesis of 1,4‐dihydropyranl [2,3‐c] pyrazloe derivatives in aqueous media . Synth. Commun. , 34 ( 24 ) : 4557
- Kaupp , G. , Naimi‐Jamal , M. R. and Schmeyers , J. 2003 . Solvent‐free Knoevenagel condensations and Michael additions in the solid state and in the melt with quantitative yield . Tetrahedron , 59 : 3753
- He , L. , Tang , Z. , Cun , L. F. , Mi , A. Q. , Jiang , Y. Z. and Gong , L. Z. 2006 . L‐proline amide–catalyzed direct asymmetric aldol reaction of aldehydes with chloroacetone . Tetrahedron , 62 : 346
- Meghana , S. R. , Mahesh , K. P. , Swapnil , S. M. and Manikrao , M. S. 2005 . An ionic liquid influenced L‐proline catalyzed asymmetric Michael addition of ketones to nitrostyrene . J. Mol. Catal. A , 235 : 267
- Sabitha , G. , Kumar , M. R. , Reddy , M. S. K. , Yadav , J. S. , Krishna , K. V. S. R. and Kunwar , A. C. 2005 . A D,L‐proline catalyzed diastereoselective trimolecular condensation: An approach to the one‐pot synthesis of perhydrofuro[3,2‐b]pyran‐5‐ones . Tetrahedron Lett. , 46 : 1659
- List , B. 2002 . Proline‐catalyzed asymmetric reactions . Tetrahedron , 58 : 5573
- Wang , S. X. , Li , J. T. and Geng , L. J. 2003 . Synthesis of bis(substituted benzylidene) cylo‐alkanones by grinding method . J. Chem. Res., Synop. , 6 : 370
- Wang , S. X. , Li , J. T. , Yang , W. Z. , Yin , Y. H. and Xie , Z. H. 2004 . Solvent‐free synthesis of ethyl α‐cyanocinnamates catalyzed by K2O‐Al2O3 using grinding method . Synth. Commun. , 34 ( 5 ) : 829