abstract |
CAROTENE COMPOUNDS E.G. B-CAROTENE, ARE PREPARED BY REACTING A SULPONE RET-SO2-R, IN WHICH RET REPRESENTS RETINYL OR SUBSTITUTED RETINYL AND R REPRESENTS A HYDROCARBON RADICAL, IN THE PRESENCE OF AN ALKALINE REAGENT WITH AN ESTER RET-X, IN WHICH X REPRESENTS AN ACID RESIDUE, AND THEN DESULPHONATING THE PRODUCT, FOR EXAMPLE WITH AN ALKALINE REAGENT. |