4-(5-Isopropenyl-2-methyl-1-cyclopenten-1-yl)-2-butanone → 3-Isopropyl-1-methyl-2-(3-oxobutyl)-cyclopent-1-ene

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Reaction Steps

4 g of 3-isopropenyl-1-methyl-2-(3-oxobutyl)-cyclopent-1-ene were hydrogenated in 50 ml of ethyl acetate in the presence of 400 mg of palladium on calcium carbonate (5%). After the uptake of one equivalent of hydrogen, the solution was filtered over Celite, concentrated and distilled under a high vacuum. There were obtained 4 g of 3-isopropyl-1-methyl-2-(3-oxobutyl)-cyclopent-1-ene; boiling point 0.005 about 70° C; nD20 = 1.4709; IRfilm : νmax = 1.725, 1390/70 and 1170 cm-1. The compound has a woody, floral note.

Provenance & Evidence