碘乙酸 、
(2Z,4S)-N-[(2R,3R,5S,6S)-6-{(2E,4E)-5-[(3R,4R,5R,7S)-7-{2-[(2-aminoethyl)amino]-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]-4-hydroxypent-2-enamide 在
N,N'-二环己基碳二亚胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 0.67h,
以27%的产率得到(2Z,4S)-4-hydroxy-N-{(2R,3R,5S,6S)-6-[(2E,4E)-5-{(3R,4R,5R,7S)-4-hydroxy-7-[2-({2-[(iodoacetyl)amino]ethyl}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}pent-2-enamide