2-[(2R,4R,5R,6S)-4-(tert-Butyl-dimethyl-silanyloxy)-5-methyl-6-((1Z,3E)-2-methyl-hepta-1,3,6-trienyl)-tetrahydro-pyran-2-yl]-ethanol 、
tert-Butyl-diphenyl-[2-((4aR,5R,7R,8aS)-2,2,4a-trimethyl-7-vinyl-tetrahydro-pyrano[4,3-d][1,3]dioxin-5-yl)-ethoxy]-silane 在
Grubbs catalyst first generation 、 tri(cycloxexyl)phosphine[1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][benzylidene]ruthenium(IV) dichloride 作用下,
以
二氯甲烷 为溶剂,
反应 49.0h,
以70%的产率得到2-[(2R,4R,5R,6S)-6-[(1Z,3E,6E)-7-[(4aR,5R,7R,8aS)-5-[2-[tert-butyl(diphenyl)silyl]oxyethyl]-2,2,4a-trimethyl-5,7,8,8a-tetrahydro-4H-pyrano[4,3-d][1,3]dioxin-7-yl]-2-methylhepta-1,3,6-trienyl]-4-[tert-butyl(dimethyl)silyl]oxy-5-methyloxan-2-yl]ethanol