(3S,4S,6R,1E)-3-(4-methoxybenzyloxy)-6-(methoxymethoxy)-1-[(2S)-4-methyl-3,6-dihydro-2H-pyran-2-yl]nona-1,8-dien-4-yl 4-{(2R,6R)-6-[(2S)-2-methylpent-4-ynyl]-5,6-dihydro-2H-pyran-2-yl}but-2-ynoate 在
cyclopentadienylruthenium(II) trisacetonitrile hexafluorophosphate 作用下,
以
丙酮 为溶剂,
以36%的产率得到(1R,7S,9S,15S,17R,10E)-7-{(1S,2E)-1-(4-methoxybenzyloxy)-3-[(2S)-4-methyl-3,6-dihydro-2H-pyran-2-yl]allyl}-9-(methoxymethoxy)-15-methyl-13-methylene-6,21-dioxabicyclo[15.3.1]henicosa-10,19-dien-3-yn-5-one