χ-caroten-4-one, assigned to tedanin, the main carotenoid pigment of the marine sponge “Tedania digitata (O. Schmidt),” has been confirmed by total synthesis starting with β,χ-carotene. An isomer, 3-hydroxy-2,3-didehydro-β,φ-caroten-4-one, was also synthesized from β,φ-carotene.
Aromaticcarotenoids, tedanin, agelaxanthin A, and tethyatene were synthesized from 0- acetyl-6-citraurin derived from natural zeaxanthin, and tethyatene was further transformed into renieratene as the first example of aromatization of an alicyclic ring in carotenoids.
The Structure of Tedanin, a New Carotenoid of<i>Tedania digitata</i>(O. Schmidt)
作者:Nobuhisa Okukado
DOI:10.1246/bcsj.48.1061
日期:1975.3
A newcarotenoid, tedanin, which was isolated as a main pigment from a sea sponge, “Tedania digitata (O. Schmidt),” was shown to have the (I) structure by means of spectroscopic and chemical evidence.