About this Chemistry article
Catalytic Hydrogenation of μ-Terpinene and 2,3-Dihydroasinole by a Phenanthrenechromium Tricarbonyl Complex by Paul Le Maux; Gerard Simonneaux is a Chemistry article available to read on EtoBox.
The hydrogenation of a-terpinene and 2,3dihydroanisole catalysed by phenanthrenechromium tricarbonyl is described and discussed. Arenechromium tricarbonyl complexes are very effective catalysts for the re$oselective 1,4hydrogenation of dienes to monoenes [1] . The substitution of a carbonyl group by a chiral ligand would be of interest in connection with asymmetric synthesis. We previously reported our results on the activities of a series of arene-Cr(CO),L compounds in catalytic hydrogenation [il. The replacement of a CO ligand in the Cr(CO), group by the I\i-benzoyl isocyanide (L = CNCOPh) and the trifluorophosphine (L = PF,) ligands led to satisfactory -catalytic properties for the hydrogenation of bicyclo[2.2\_1] hepta-2,5diene, In continuation of this work, we now report preliminary studies of the catalytic hydrogenation of two prochiral dienes, f,&dihydroanisole and a-terpinene-Attempts to induce asymmetric catalytic activity by adding chiral ketones to the hydrogenation mixture are also described\_ The 2,3\_dihydroanisole contaminated with approximately 20% of the 2,5dihydroanisole was first chosen as a substrate because of its commercial availability and because the hydroge
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- Author
- Paul Le Maux; Gerard Simonneaux
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)
- Published
- 1982
- Language
- EN
- Field
- Chemistry (Physical Sciences)