01505nas a2200265   4500008004100000022001400041245013700055210006900192260007300261300001400334490000600348520052600354653001600880653002300896653002100919653001500940653003500955653000800990100002200998700001901020700001901039700002401058700002901082856012801111       2008                        eng d  a1566-736700aPhosphotungstic acid on silica with modified acid sites as a solid catalyst for selective cleavage of tert-butyldimethylsilyl ethers0 aPhosphotungstic acid on silica with modified acid sites as a sol  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a1863-18680 v93 a<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>10aAmmonia TPD10aCatalytic cleavage10areaction pathway10asolid acid10atert-butyldimethylsilyl ethers10aXRD1 aBhure, Mahesh, H.1 aKumar, Indresh1 aNatu, Arun, D.1 aChikate, Rajeev, C.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/phosphotungstic-acid-silica-modified-acid-sites-solid-catalyst-selective-cleavage-tert-0