(3R,4R,5R)-7,7-dimethyl-5-vinyl-1,6-dioxaspiro[2.5]octan-4-ol 、
(S,Z)-5-(((2R,5s)-2-((E)-3-methylpenta-2,4-dien-1-yl)-1,3-dioxan-5-yl)amino)-5-oxopent-3-en-2-yl acetate 在
1,3-bis-(2,4,6-trimethylphenyl)-2-(imidazolidinylidene)dichloro(5-nitro-2-isopropoxyphenylmethylene)ruthenium 、
对苯醌 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 44.0h,
以26%的产率得到(S,Z)-5-(((2R,5S)-2-((2E,4E)-5-((3R,4R,5R)-4-hydroxy-7,7-dimethyl-1,6-dioxaspiro[2.5]octan-5-yl)-3-methylpenta-2,4-dien-1-yl)-1,3-dioxan-5-yl)amino)-5-oxopent-3-en-2-yl acetate