Grinding and Milling: Two Efficient Methodologies in the Solvent-Free Phosphomolybdic Acid-Catalyzed and Mechanochemical Synthesis of<i>cis</i>-4-Amido-<i>N</i>-yl-2-methyl-tetrahydroquinolines
作者:Vladimir V. Kouznetsov、Diego R. Merchán-Arenas、Carlos A. Martínez-Bonilla、Mario A. Macías、Pascal Roussel、Gilles H. Gauthier
DOI:10.5935/0103-5053.20160117
日期:——
The ball-milling process of ABB' Povarov reaction through mechano-chemical activation with phosphomolybdic acid (PMA) as heteropolyacid (HPA) catalyst, was first time explored. The developed high speed vibratory ball milling (HSVBM) green method offers simple and efficient diastereoselective synthesis of cis-2,4-disubstituted tetrahydroquinolines in good to excellent yields (56-76%).
Phosphotungstic Acid: An Efficient Catalyst for Synthesis of 2-Substituted Tetrahydroquinoline via Imino Diels–Alder Reaction and Fluorescent Studies
作者:Kavitha C. S. Achar、Kallappa M. Hosamani、Harisha R. Seetharamareddy
DOI:10.1080/00397910903531672
日期:2010.12.21
For the first time Phosphotungstic acid (PTA), is used as a some new catalyst for the synthesis of tetrahydroquinoline derivatives with high yields is described. PTA a heterogeneous catalyst is inexpensive, easily available, eco-friendly, water soluble, recoverable, stable to aqueous reaction conditions and further more, these 2-methyl tetrahydroquinoline derivatives shows a remarkable fluorescence property.