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US 2015/0031910 A1Published application
Catalytic synthesis of vitamin a intermediate
AssigneeDsm IP Assets B.V.
InventorsWerner Bonrath, Bettina Wuestenberg, Thomas Netscher, Jan Schuetz
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Abstract
The present invention relates to a process of production of a compound, which is useful as an intermediate (building block) in organic synthesis, especially in the synthesis of vitamin A or β-carotene and derivatives thereof, e.g. canthaxanthin, astax-anthin or zeaxanthin.
Claims9
A process of production of compounds of formula (I)
- wherein
- R1 signifies a C1-C15 alkyl moiety or a C2-C18 alkenyl moiety, characterised in that a compound of formula (II)
- is reacted with a compound of formula (III)
- wherein
- R1 has the same definition as for compound (I),
- and at least one organic nitrogen containing base,
- by using Zn[SO3CF3]2 as catalyst.
4 more elements
Dependencies are inferred from the claim text.