JPS6332778B
The invention concerns new 3-methyl-5-keto- alpha , omega -alkene-dioic acids of the general formula wherein the double bond is in one of the positions indicated by the broken lines, R1 and R2 independently of one another are a hydrogen atom or a C1-C4-alkyl group, x is an integer from 9 to 11 and y...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention concerns new 3-methyl-5-keto- alpha , omega -alkene-dioic acids of the general formula wherein the double bond is in one of the positions indicated by the broken lines, R1 and R2 independently of one another are a hydrogen atom or a C1-C4-alkyl group, x is an integer from 9 to 11 and y and z independently of one another are 1 or 2, but cannot both be 1; a process for their preparation and their use for the preparation of macrocyclic beta -methyl ketones which are valuable fragrances. |
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