Polymer supported sulphanilic acid: A highly efficient and recyclable green heterogeneous catalyst for the construction of 4,5-dihydropyrano[3,2-c]chromenes under solvent-free conditions

[1]  Dipak K. Raval,et al.  1-Methylimidazolium trifluoroacetate [Hmim]Tfa: Mild and efficient Brønsted acidic ionic liquid for Hantzsch reaction under microwave irradiation , 2012, Journal of Chemical Sciences.

[2]  Dipak K. Raval,et al.  Ionic liquid catalyzed convenient synthesis of imidazo[1,2-a]quinoline under sonic condition , 2012 .

[3]  A. Dadhania,et al.  A facile approach for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones using a microwave promoted Biginelli protocol in ionic liquid , 2012, Journal of Chemical Sciences.

[4]  A. Dadhania,et al.  Catalyst-free sonochemical synthesis of 1,8-dioxo-octahydroxanthene derivatives in carboxy functionalized ionic liquid , 2012 .

[5]  B. Bhanage,et al.  Allylation of 1-phenyl-1-propyne with N- and O-pronucleophiles using polymer supported triphenylphosphine palladium complex as a heterogeneous and recyclable catalyst , 2011 .

[6]  A. T. Khan,et al.  One-pot three-component reaction for the synthesis of pyran annulated heterocyclic compounds using DMAP as a catalyst , 2011 .

[7]  S. Paul,et al.  One-pot synthesis of dihydropyrano[2,3-c]chromenes via a three component coupling of aromatic aldehydes, malononitrile, and 3-hydroxycoumarin catalyzed by nano-structured ZnO in water: a green protocol , 2011 .

[8]  M. Heravi,et al.  Morpholine Catalyzed One‐pot Multicomponent Synthesis of Compounds Containing Chromene Core in Water , 2011 .

[9]  Ying He,et al.  Polymer-supported macrocyclic Schiff base palladium complex: An efficient and reusable catalyst for Suzuki cross-coupling reaction under ambient condition , 2011 .

[10]  A. Dadhania,et al.  A convenient and efficient protocol for the one pot synthesis of 3,4-Dihydropyrimidin-2-(1H)-ones catalyzed by ionic liquids under ultrasound irradiation , 2011 .

[11]  I. Mateos-Aparicio,et al.  Poly(styrenesulphonic) acid: an active and reusable acid catalyst soluble in polar solvents , 2011 .

[12]  E. Kalu,et al.  Polymer-immobilized palladium supported on TiO2 (Pd–PVB–TiO2) as highly active and reusable catalyst for hydrogen generation from the hydrolysis of unstirred ammonia–borane solution , 2011 .

[13]  E. Kalu,et al.  Hydrogen generation from the hydrolysis of ammonia borane using cobalt-nickel-phosphorus (Co-Ni-P) catalyst supported on Pd-activated TiO2 by electroless deposition , 2011 .

[14]  Pooja Saluja,et al.  DBU: a highly efficient catalyst for one-pot synthesis of substituted 3,4-dihydropyrano[3,2-c]chromenes, dihydropyrano[4,3-b]pyranes, 2-amino-4H-benzo[h]chromenes and 2-amino-4H benzo[g]chromenes in aqueous medium , 2010 .

[15]  A. Karimi,et al.  Novel Mono- and Bis(spiro-2-amino-4H-pyrans): Alum-Catalyzed Reaction of 4-Hydroxycoumarinand Malononitrile with Isatins, Quinones, or Ninhydrin , 2010 .

[16]  D. Hadjipavlou-Litina,et al.  Synthesis and anti-inflammatory evaluation of novel angularly or linearly fused coumarins. , 2009, European journal of medicinal chemistry.

[17]  Atul Kumar,et al.  Pyranocoumarins: a new class of anti-hyperglycemic and anti-dyslipidemic agents. , 2009, Bioorganic & medicinal chemistry letters.

[18]  Jun Luo,et al.  One-pot synthesis of polyfunctionalized pyrans catalyzed by basic ionic liquid in aqueous media , 2009 .

[19]  Sanjay Kumar,et al.  Tetrabutylammonium bromide (TBAB): a neutral and efficient catalyst for the synthesis of biscoumarin and 3,4-dihydropyrano[c]chromene derivatives in water and solvent-free conditions , 2009 .

[20]  H. Sheibani,et al.  High Surface Area MgO as a Highly Effective Heterogeneous Base Catalyst for Three-Component Synthesis of Tetrahydrobenzopyran and 3,4-Dihydropyrano[c]chromene Derivatives in Aqueous Media , 2008 .

[21]  E. Schweizer,et al.  2H‐ and 4H‐1‐Benzopyrans , 2008 .

[22]  S. Balalaie,et al.  Novel and efficient catalysts for the one-pot synthesis of 3,4-dihydropyrano[c]chromene derivatives in aqueous media , 2007 .

[23]  M. Kidwai,et al.  Convenient Preparation of Pyrano Benzopyranes in Aqueous Media , 2006 .

[24]  A. Shaabani,et al.  Ionic Liquid Promoted Efficient and Rapid One-pot Synthesis of Pyran Annulated Heterocyclic Systems , 2005 .

[25]  Jinming Gao,et al.  Efficacy of beta-lapachone in pancreatic cancer treatment: Exploiting the novel, therapeutic target NQO1 , 2005, Cancer biology & therapy.

[26]  P. Metz,et al.  Synthesis and Molluscicidal Activity of 5‐oxo‐5,6,7,8‐Tetrahydro‐4H‐Chromene Derivatives , 2004, Archiv der Pharmazie.

[27]  L. H. Carvalho,et al.  Antimalarial activity of phenazines from lapachol, beta-lapachone and its derivatives against Plasmodium falciparum in vitro and Plasmodium berghei in vivo. , 2004, Bioorganic & medicinal chemistry letters.

[28]  V. K. Ahluwalia,et al.  Comprehensive Practical Organic Chemistry: Preparation and Quantitative Analysis , 2004 .

[29]  N. Monteiro,et al.  Pd‐Assisted Multicomponent Synthesis of Heterocycles , 2003 .

[30]  M. Greef,et al.  Recent Advances in Solution-Phase Multicomponent Methodology for the Synthesis of Heterocyclic Compounds , 2003 .

[31]  S. Bräse,et al.  The recent impact of solid-phase synthesis on medicinally relevant benzoannelated nitrogen heterocycles. , 2002, Bioorganic & medicinal chemistry.

[32]  I. Ugi,et al.  Multicomponent Reactions with Isocyanides. , 2000, Angewandte Chemie.

[33]  Thomas,et al.  Design, Synthesis, and In Situ Characterization of New Solid Catalysts. , 1999, Angewandte Chemie.

[34]  David Flaxbart.  Comprehensive Heterocyclic Chemistry II: A Review of the Literature 1982−1995. 12 Volume Set Editors-in-chief: Alan R. Katritzky, Charles W. Rees, and Eric, F. V. Scriven. Elsevier (Pergamon): Oxford. 1997. 11 856 pp. $6345.00. ISBN 0-08-042072-9. , 1997 .

[35]  W. Herrmann,et al.  Organometallic Homogeneous Catalysis—Quo vadis? , 1997 .

[36]  D. Avnir,et al.  Comparison between homogeneous and sol-gel-encapsulated rhodium-quaternary ammonium ion pair catalysts , 1996 .

[37]  Alan R. Katritzky,et al.  Comprehensive Heterocyclic Chemistry IV , 1996 .

[38]  M. H. Elnagdi,et al.  Nitriles in heterocyclic synthesis: novel synsthesis of benzo[c]-coumarin and of benzo[c]pyrano[3,2-c]quinoline derivatives , 1987 .

[39]  G. M. Badger,et al.  The chemistry of heterocyclic compounds , 1961 .

[40]  J. Loudon.  Chemistry of Heterocyclic Compounds , 1954, Nature.