、 Methyl propane-1,1,3-tricarboxylate 、 2-溴庚酸甲酯 以there is obtained 60 g (41%) of 2-n-pentyl-3-oxo-cyclopentanecarboxylic acid, melting at 52°C.的产率得到1-Pentyl-cyclopentanon-(5)-carbonsaeure-(2)
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Alicyclic ketoesters and process for their manufacture
New alicyclic ketoesters having the generic formula ##STR1## wherein R represents a hydrocarbon radical containing from 4 to 8 carbon atoms, and R' represents an alkyl radical containing from 1 to 2 carbon atoms, are prepared, in one embodiment, by condensing the methyl or ethyl ester of propane-1,2,3-tricarboxylic acid with methyl or ethyl esters of 2-bromo acids containing from 6 to 9 carbon atoms, and hydrolyzing, decarboxylating and re-esterifying the resulting cyclic keto-triesters. The new compounds have olfactory properties and are useful in the production of a great variety of perfumes.