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US 2023/0142429 A1Published application
Process for production of new sulfolenic intermediates
AssigneeDsm IP Assets B.V.
InventorsWerner BONRATH, Marc-André MUELLER, Bettina WUESTENBERG, Viktor ZIMMERMANN
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Abstract
The present invention relates to a new process for the production of new specific intermediates, which are preferably used in the production of vitamin A, vitamin A acetate, or β-carotene and derivatives thereof, e.g. canthaxanthin, astaxanthin or zeaxanthin.
Claims12
Process of the production of compounds of formula (I)
- wherein
- R is H, or —(CO)—(CH2)nCH3, wherein n has a value of 0-14 or
- R is —X(C1-4alkyl)3 or —X(C6H5)3, wherein X is Si or Ge
- or R is tetrahydro pyrane, isopropylmethyl ether or 2-methoxy-butylether,
- wherein the compound of formula (II)
- is reacted with the compound of formula (III)
- wherein R has the same meanings as defined for the compound of formula (I).
4 more elements
Compounds of formula (I)
- wherein
- R is H, or —(CO)—(CH2)nCH3, wherein n has a value of 0-14, or
- R is —X(C1-4alkyl)3 or —X(C6H5)3, wherein X is Si or Ge
- or R is tetrahydro pyrane, isopropylmethyl ether or 2-methoxy-butylether.
1 more element
Dependencies are inferred from the claim text.