Methyl (4R)-1-{(2S)-2-cyclopentyl-2-[({[(trans)-2-pent-4-en-1-ylcyclopentyl]oxy}carbonyl)amino]acetyl}-4-[(2-vinylquinolin-3-yl)oxy]-L-prolinate 在
catalyst SiO2 、 EtOAc petroleum ether 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 1.5h,
以to give in the first fractions methyl (3 aR,7S,10S,12R,20E,24aR)-7-cyclopentyl-5,8-dioxo-1,2,3,3a,5,6,7,8,11,12,22,23,24,24a-tetradecahydro-10H-9,12-methanocyclopenta[18,19][1,10,3,6]dioxadiazacyclononadecino[12,11-b]quinoline-10-carboxylate (194 mg, 42%)的产率得到methyl (3aR,7S,10S,12R,20E,24aR)-7-cyclopentyl-5,8-dioxo-1,2,3,3a,5,6,7,8,11,12,22,23,24,24a-tetradecahydro-10H-9,12-methanocyclopenta[18,19][1,10,3,6]dioxadiazacyclononadecino[12,11-b]quinoline-10-carboxylate