3base
(Newbee) 06-01-02 08:34 No 316668 |
refs: piperonal from isosafrole | Bookmark | ||||||
journal of applied electrochemistry, 2000 30, 467-474 "Electrochemical behaviour of olens: oxidation at rutheniumtitanium dioxide and iridiumtitanium dioxide coated electrodes" C.L.P.S. ZANTA, A.R. de ANDRADE and J.F.C. BOODTS "... the main oxidation product of isosafrole is piperonal, a widely used product in the perfume industry. Large-scale production of piperonal involves Cr(VI) as an oxidant [19]. Although economi- cally feasible, the use of Cr(VI) is a drawback. Alterna- tive production processes have been investigated, for example, homogeneous electrocatalysis using a Ru(IV) pyridine complex [20] and more recently direct oxidation with PbO2 or indirect oxidation with MnO2 as proposed by Grimshaw and Hua [21]. piperonal yields of 48.9% [20] and 54% [21] in indirect oxidation and 35% [21] in direct oxidation were obtained." [19] N.T. Farinacci, US Pat. 2 794 813 (1957); Chem. Abstr. 51, 6572 (1957); A.V. Bogastskii, A.P. Antonov, Y.V. Gavyevich, V.V. Titor and V.Y. Kalashnikov, USSR Pat. 490 793 (1975); Chem. Abstr. 84, 74254 (1976). [20] J.M. Madurro, G. Chiericato, W.F. de Giovani and J.R. Romero, Tetrahedron Lett. 29 (1988) 765. [21] J. Grimshaw and C. Hua, Electrochim. Acta 39 (1994) 497. "Whatever there is to learn has to be learned the hard way." Castaneda's teacher Don Juan Matus |
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Rhodium (Chief Bee) 06-04-02 11:57 No 317575 |
References | Bookmark | ||||||
Reference 21: ../rhodium/pdf /isosafrole2pi The above article: ../rhodium/pdf /isosafrole2pi |
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