| abstract |
1313646 Phenyl pentenals INTERNATIONAL FLAVORS & FRAGRANCES Inc 28 May 1971 [4 June 1970] 20099/72 Divided out of 1313645 Heading C2C 3-Phenyl pentenals are prepared by mixing in the presence of a protonic acid catalyst, for example phosphoric acid, an alkyl vinyl ether of formula where A is alkyl, for example ethyl vinyl ether, and a 3-phenyl-propen-2-ol-1 of formula where R 2 -R 7 are hydrogen or C 1 -C 5 alkyl and R 8 -R 12 are hydrogen, C 1 -C 5 alkyl, or C 1 -C 5 alkoxy, for example 3-phenyl-propen-2-ol-1. |