On July 31, 2013, Ahn, Sung-Hyun; Choi, Moo-Seok; Im, Jun-Seop; Sheikh, Rizwan; Park, Yeung-Ho published an article.Recommanded Product: 3976-69-0 The title of the article was Improved method for immobilization of a chiral complex on PTA/alumina for asymmetric hydrogenation of a β-ketoester. And the article contained the following:
Ru-BINAP was immobilized on alumina using the well-known Augustine method with heteropoly acid (HPA) as the anchoring agent (“Augustine catalyst”). The supported catalyst was tested in a high-pressure reaction such as asym. hydrogenation of Me acetoacetate (MAA). Since the activity of the supported catalyst was significantly lower than that of the homogeneous catalyst, the solvent used in preparing PTA/Al2O3 was changed from ethanol to a solution of HCl. The modified supported catalyst (“modified Augustine catalyst”) exhibited higher conversion, better selectivity, and improved enantioselectivity compared with the catalyst prepared by the Augustine method. The modified Augustine catalyst also produced β-hydroxyesters with good yield and enantioselectivity in asym. hydrogenation of various β-ketoester derivatives The modified Augustine catalyst was examined by FT-IR, XRD, NH3-TPD, and ICP-AES, which revealed the existence of strong acid sites formed by HPA with a Keggin structure. These results were attributed to the effect of enhanced acidity on the modified Augustine catalyst. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Recommanded Product: 3976-69-0
The Article related to phosphotungstic acid ruthenium binap alumina asym hydrogenation beta ketoester, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Recommanded Product: 3976-69-0
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