| abstract |
NEW MATERIAL:A compound shown by the formula I (R is 1W6C alkyl; R 1 is H, or 1W3C alkyl; when R is 1C alkyl, R 1 is 2W4C alkyl, and when R is 2C alkyl or 4W6C alkyl, R 1 is 1W3C alkyl). n EXAMPLE: 2-Ethyl-cis-3-pentenoic acid. n USE: An imparter for providing fragrance and flavor having durability or a modifier. Having a main tone of fragrance and flavor like fruit or grass, showing a tone of fruit, green flower, etc. which may have fatty fragrance and flavor. n PREPARATION: A trans-2-alkenoic acid shown by the formula II is isomerized in an organic solvent in the presence of both hexamethylphosphoric acid triamide and a basic organic alkali metal compound (e.g., methyllithium, etc.) at about -70Wabout -50°C, to give a compound shown by the formula I easily. n COPYRIGHT: (C)1985,JPO&Japio |