Preparation of Cyclamenaldehyde by Selective Hydrogenation in Some Cobalt Carbonyl Complex Catalysts under Oxo Conditions
- 1 February 1972
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 45 (2) , 604-607
- https://doi.org/10.1246/bcsj.45.604
Abstract
Selective hydrogenation of p-isopropyl-α-methylcinnamaldehyde to cyclamenaldehyde in some cobalt carbonyl complex catalyst systems has been investigated under several oxo conditions. The yield of the aimed aldehyde was improved as much as 84 to 86.3% under controlled conditions. Selectivity of the hydrogen increased with the decrease of temperature and the increase of partial pressure of hydrogenation in a water gas. A maximum yield (84%) was obtained with solvents such as isopropyl ether and hexane when used in 2-fold volume for the cinnamaldehyde. A tris(2-bromoethyl) phosphite-substituted cobalt carbonyl complex catalyst gave the best yield (86.3%) as compared with catalysts unsubstituted and substituted with PR3, P(OR)3, and PO(OR)3(R=alkyl, aryl).This publication has 4 references indexed in Scilit:
- Selective Hydrogenation of Cinnamaldehyde over Palladium Boride CatalystNippon kagaku zassi, 1969
- Preparation of Cyclamen-type Perfume Compounds. IJournal of Synthetic Organic Chemistry, Japan, 1964
- Preparation of Cyclamentype Perfume Compounds.IIJournal of Synthetic Organic Chemistry, Japan, 1964
- The Reaction of Cobalt Hydrocarbonyl with α,β-Unsaturated Aldehydes and KetonesJournal of the American Chemical Society, 1963