N-甲基吗啉 、
ethyl (2Z)-4-[(1R,3aS,5S,11R,14aS)-11-[(3E)-5-chloro-4-methylpent-3-en-1-yl]-3a,4,5,7-tetrahydro-8-hydroxy-3,3,11-trimethyl-13-(3-methylbut-2-en-1-yl)-7,15-dioxo-3H,11H-1,5-methanofuro[3,4-g]pyrano[3,2-b]xanthen-1-yl]-2-methylbut-2-enoate 在
potassium carbonate 、 potassium iodide 作用下,
以
丙酮 为溶剂,
反应 6.0h,
以10%的产率得到ethyl (2Z)-4-{(1R,3aS,5S,11R,14aS)-3a,4,5,7-tetrahydro-8-hydroxy-3,3,11-trimethyl-13-(3-methylbut-2-en-1-yl)-11-[(3E)-4-methyl-5-(morpholin-4-yl)pent-3-en-1-yl]-7,15-dioxo-3H,11H-1,5-methanofuro[3,4-g]pyrano[3,2-b]xanthen-1-yl}-2-methylbut-2-enoate