Author Topic: refs: piperonal from isosafrole  (Read 564 times)

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refs: piperonal from isosafrole
« on: June 01, 2002, 08:34:00 AM »
journal of applied electrochemistry, 2000 30, 467-474
"Electrochemical behaviour of olens: oxidation at rutheniumtitanium
dioxide and iridiumtitanium dioxide coated electrodes"

"... 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.

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