01386nas a2200241   4500008004100000022001400041245008900055210006900144260009500213300001200308490000800320520046100328653002500789653003600814653002800850653003000878100001700908700001800925700003000943700001900973700002600992856012601018       2005                        eng d  a0021-951700aMCM-41-supported platinum carbonyl cluster-derived asymmetric hydrogenation catalyst0 aMCM41supported platinum carbonyl clusterderived asymmetric hydro  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJAN  a298-3020 v2293 a<p>Anionic platinum carbonyl cluster has been ion paired with cinchonidium groups that are chemically bound to the surface of MCM-41 and fumed silica. In the hydrogenation of methyl pyruvate or acetophenone the fumed silica-based catalyst gives zero enantioselectivity, but under optimum conditions enantiomeric excesses of &gt;90 and similar to40%, respectively, are obtained with the MCM-41-based catalyst. (C) 2004 Elsevier Inc. All rights reserved.</p>10aasymmetric catalysis10afunctionalized inorganic oxides10ahydrogenation catalysts10aplatinum carbonyl cluster1 aBasu, Susmit1 aPaul, Himadri1 aGopinath, Chinnakonda, S.1 aBhaduri, Sumit1 aLahiri, Goutam, Kumar  uhttps://library.ncl.res.in/content/mcm-41-supported-platinum-carbonyl-cluster-derived-asymmetric-hydrogenation-catalyst-0