PREPARATION DE COMPOSES CAROTENOIDES

摘要

1299333 4,41-dihydroxy-#-carotene RHONEPOULENC SA 14 Jan 1971 [15 Jan 1970] 1964/71 Heading C2V 4,41 - Dihydroxy - # - carotene (isozeaxanthine) and its esters are prepared by reacting retrodehydro-#-carotene with iodine in the presence of a saturated aliphatic monocarboxylic acid and an organic base, followed, if desired, by saponifying the ester thus obtained to liberate 4,41-dihydroxy-#-carotene. In an example retrodehydro-#-carotene is reacted with iodine, acetic acid and N-ethylmorpholine and the product is saponified with potassium hydroxide.