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Efficient deprotection of phenol methoxymethyl ethers using a solid acid catalyst with Wells-Dawson structure
(Molecular Diversity Preservation International, 2001-11-30)
Deprotection of various phenols from their respective methoxymethyl ethers using an heteropolyacid catalyst was studied. The catalyst was the Wells-Dawson heteropolyacid, used both in bulk or supported on silica. Yields ...
Efficient method for tetrahydropyranylation/depyranylation of phenols and alcohols using a solid acid catalyst with Wells-Dawson structure
(Pergamon-Elsevier Science Ltd, 2002-10)
A simple and efficient procedure to form 2-tetrahydropyranyl acetals of phenols and alcohols is reported. Wells-Dawson heteropolyacid catalyst is used both in bulk form or supported on silica, reaction conditions include ...
Wells-Dawson type catalyst: An efficient, recoverable, and reusable solid acid catalyst for the solvent-free synthesis of benzodiazepines
(Bentham Science Publishers, 2014-03)
Various 3-H-1,5-benzodiazepines were prepared from the solvent-free reaction of o-phenylenediamine and substituted 1,3-diphenyl-1,3-propanedione, giving good yields of benzodiazepines. The H6P2W18O62.24H2O solid heteropolyacid, ...
Stability of phospho-molybdic Wells-Dawson-type ion P2Mo18O62 6- in organic media
(Elsevier Science, 2003-08)
The stability of the ammonium phospho-molybdic Wells-Dawson-type salt (NH4)6P2Mo18O62·12 H2O in various organic media was investigated at room temperature and 50 °C through infrared spectroscopy. The heteropoly-anion ...
Efficient deprotection of phenol methoxymethyl ethers using a solid acid catalyst with Wells-Dawson structure
(MDPI (Multidisciplinary Digital Publishing Institute), 2001)
Wells–Dawson heteropolyacid supported on silica: isobutane alkylation with C4 olefins
(Elsevier Science, 2001-09)
The alkylation of isobutane with C4 olefins is studied, using heteropolyacids (HPA) with Wells–Dawson (WD) structure supported on silica (WD/SiO2). The catalytic performance of these catalysts is compared with a ...