2,3:4,5-bis-O-(isopropylidene)-D-fructopyranose aldehyde 、
(4-methoxyphenacylidene)triphenyl phosphorane 以
氯仿 为溶剂,
反应 2.5h,
以75%的产率得到(E)-1-(4-Methoxy-phenyl)-3-((3aS,5aR,8aR,8bS)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-3a-yl)-propenone