@article { ISI:000256183700015,
	title = {Phosphotungstic acid on silica with modified acid sites as a solid catalyst for selective cleavage of tert-butyldimethylsilyl ethers},
	journal = {Catalysis Communications},
	volume = {9},
	number = {9},
	year = {2008},
	month = {MAY},
	pages = {1863-1868},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>The strength and nature of acid sites of bulk phosphotungstic acid could be modified after dispersing it on silica support which was characterized by XRD, ammonia TPD and (31)P MAS NMR techniques. This solid acid catalyst was found to be highly selective for the cleavage of tert-butyldimethylsilyl ethers at room temperature. The catalyst was easily recovered by filtration and could be reused for several times without loss of any activity giving a TON of 9.5 x 10(5). (C) 2008 Elsevier B.V. All rights reserved.</p>},
	keywords = {Ammonia TPD, Catalytic cleavage, reaction pathway, solid acid, tert-butyldimethylsilyl ethers, XRD},
	issn = {1566-7367},
	doi = {10.1016/j.catcom.2008.03.017},
	author = {Bhure, Mahesh H. and Kumar, Indresh and Natu, Arun D. and Chikate, Rajeev C. and Rode, Chandrashekhar V.}
}
@article { ISI:000270338700005,
	title = {Solid acid catalysts: modification of acid sites and effect on activity and selectivity tuning in various reactions},
	journal = {Catalysis Surveys from Asia},
	volume = {13},
	number = {3},
	year = {2009},
	month = {SEP},
	pages = {205-220},
	publisher = {SPRINGER/PLENUM PUBLISHERS},
	address = {233 SPRING ST, NEW YORK, NY 10013 USA},
	abstract = {<p>The effects of acidity and variation in concentration of acid sites of dodecatungstophosphoric acid (DTP), supported DTP and montmorillonite-K catalysts were studied for various organic reactions such as the hydroxyalkylation of phenols to bisphenols, intramolecular rearrangement of benzyl phenyl ether (BPE) to 2-benzyl phenol (2-BP) and selective cleavage of tert-butyldimethylsilyl (TBDMS) ether into the corresponding alcohol. Both dodecatungstophosphoric acid (DTP) impregnated on silica (SiO(2)) and montmorillonite catalysts showed the highest catalyst activity with 90-95\% selectivity to bisphenol for the hydroxyalkylation of phenols to give bisphenol. Temperature Programmed Desorption (TPD) of ammonia and activity results of various catalysts showed that an appropriate combination of both strong and weak acidic sites in the catalyst was highly desirable for high bisphenol selectivity. A 10\% DTP/SiO(2) catalyst was found to be highly selective for the cleavage of TBDMS ether into the corresponding alcohol at room temperature giving a high TON of 9.5 x 10(5) even after the 4th recycle. DTP was also found to be a promising solid acid catalyst for the intramolecular rearrangement of BPE giving 2-BP.</p>},
	keywords = {Acidity tuning, Catalytic cleavage, Hydroxyalkylation, Intramolecular rearrangement, solid acid catalysts},
	issn = {1571-1013},
	doi = {10.1007/s10563-009-9078-4},
	author = {Rode, C. V. and Garade, Ajit C. and Chikate, Rajeev C.}
}
