| abstract |
The present invention relates to a compound of formula (I), a process for its preparation, as well as an organic synthesis, in particular vitamin A or β-carotene or derivatives thereof, or other carotenoids such as canthaxanthin, astaxanthin or zeaxanthin And preferably to the use thereof in the synthesis of vitamin A: (I) In this formula, R 1 represents a C 1 -C 15 alkyl residue or a C 2 to C 18 alkenyl residue. |