反应详情

528 mg of 1-methyl-4-methylen-6-oxo-2,3,3a, 4,5,6,7,8-octahydroazulene were hydrogenated in20 ml of ethyl acetate wit the aid of 200 mg of palladium-on-calcium carbonate (5%): After hydrogen uptake was completed the mixture was filtered off from the catalyst, the filtrate concentrated under reduced pressure and distilled. There was obtained pure 1,4-dimethyl-6-oxo-2,3,3a, 4,5,6,7,8-octahydroazulene, b.p.0.06 60°; IR(film):νmax = 1700, 1450, 1378, 1250, 1190 cm-1. The compound has a woody, earthy, camphorous odour.

1. filtrationwas filtered off from the catalyst
2. concentrationthe filtrate concentrated under reduced pressure
3. distillationdistilled