SYNTHESIS OF ZEAXANTHIN-AND CRYPTOXANTHIN-#beta#-D-GLUCOPYRANOSIDES

摘要

#beta#-Glucosidation of (3R)-3-hydroxy-#beta#-ionone (6) was achieved in a reasonable yield by use of tetra-O-benzoyl-#alpha#-D-glucopyranosyl bromide (8c) as a glycosyl donor and silver triflate as an activator.The resulting glucoside (9) was transformed into the #beta#-apo-12'-car otenal (18),which was cndensed with the Wittig salt (19) or (20) to provide zeaxanthin-mono-#beta#-D-glucopyranoside (3) or cryptoxanthin-#beta#-D-glucopyranoside(4).