Silica-bonded propylpiperazine-N-sulfamic acid as recyclable solid acid catalyst for preparation of 2-amino-3-cyano-4-aryl-5,10-dioxo- 5,10-dihydro-4H-benzo[g]chromenes and hydroxy-substituted naphthalene-1,4-dione derivatives
作者:Fahime Khorami、Hamid Reza Shaterian
DOI:10.1016/s1872-2067(12)60761-x
日期:2014.2
Abstract An efficient method for the synthesis of 2-amino-3-cyano-4-aryl-5,10-dioxo-5,10-dihydro-4 H -benzo[ g ]chromenes and hydroxy-substituted naphthalene-1,4-dione derivatives, usingsilica-bonded propylpiperazine- N -sulfamic acid as a solidacid, green, heterogeneous catalyst, under ambient and solvent-free conditions, is described. A simple procedure, high yields, short reaction time, safety
Facile one-pot green synthesis of 2-amino-4<i>H</i>-benzo[<i>g</i>]chromenes in aqueous ethanol under ultrasound irradiation
作者:Shabalala Nhlanhla Gracious、Nagaraju Kerru、Suresh Maddila、Werner E. van Zyl、Sreekantha B. Jonnalagadda
DOI:10.1080/00397911.2020.1761393
日期:2020.7.2
Abstract We report an efficient green one-pot approach for the synthesis of eighteen novel dihydro-4H-benzo[g]chromene derivatives underultrasoundirradiation conditions. The three-component condensation reaction proceeded through Knoevenagel-Michael reaction of chosen active methylene compounds and 2-hydroxynaphthalene-1,4-dione with different substituted aldehydes in the presence of ammonium acetate
One-Pot Synthesis of Some2-Amino-4H-benzo[g]chromenes
作者:Behrooz Maleki
DOI:10.1080/00304948.2016.1127104
日期:2016.1.2
biological activities of some 2-amino-4H-benzo[g]chromenederivatives have prompted considerable attention to their preparation. To the best of our knowledge, a few procedures have been used for the synthesis of 2-amino-4H-benzo[g]chromenes such as triethylbenzylammonium chloride (TEBA), DMF/AcOH under microwave irradiation, Et3N, 18 DBU, ionicliquids, Zn(L-Proline)2, 24 potassium phthalimide-Noxyl
Effective preparation of 2-amino-3-cyano-4-aryl-5,10-dioxo-5,10-dihydro-4H-benzo[g]chromene and hydroxyl naphthalene-1,4-dione derivatives under ambient and solvent-free conditions
作者:Hamid Reza Shaterian、Majid Mohammadnia
DOI:10.1016/j.molliq.2012.10.012
日期:2013.1
The mild basicionicliquids, 1,8-diazabicyclo[5.4.0]-undec-7-en-8-ium acetate, pyrrolidinium acetate, pyrrolidinium formate, piperidinium acetate, piperidinium formate, N-methylimidazolium formate, and 3-hydroxypropanaminium acetate catalyzed three-componentsynthesis of 2-amino-3-cyano-4-aryl-5,10-dioxo-5,10-dihydro-4H-benzo[g]chromene and hydroxyl naphthalene-1,4-dione derivatives under ambient