(2S,3Z)-5-({(2R,3R,5S,6S)-6-[(2E,4E)-5-{(3R,4R,5R,7S)-7-[2-(1,2-dimethylhydrazinyl)-2-oxoethyl]-4-hydroxy-1,6-dioxaspiro[2.5]oct-5-yl}-3-methylpenta-2,4-dien-1-yl]-2,5-dimethyltetrahydro-2H-pyran-3-yl}amino)-5-oxopent-3-en-2-yl acetate 、
N,N-二异丙基乙胺 、
二甲基肼吡啶 、 tetrahydrofuran N,N-dimethylformamide 在
Brine 、
Sodium sulfate-III 、 crude desired material 作用下,
以
水 、
乙酸乙酯 为溶剂,
反应 0.5h,
以to give #B145 as a white solid的产率得到(2S,3Z)-5-{[(2R,3R,5S,6S)-6-{(2E,4E)-5-[(3R,4R,5R,7S)-4-hydroxy-7-{2-[(trans-4-hydroxycyclohexyl)amino]-2-oxoethyl}-1,6-dioxaspiro[2.5]oct-5-yl]-3-methylpenta-2,4-dien-1-yl}-2,5-dimethyltetrahydro-2H-pyran-3-yl]amino}-5-oxopent-3-en-2-yl acetate