(1R,4R,5R,8R,13R,14R,17R,18R,19R)-11-amino-4,5,9,9,13,20,20-heptamethyl-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracos-11-en-10-one 在
对甲苯磺酸 作用下,
以
5,5-dimethyl-1,3-cyclohexadiene 、
乙醇 为溶剂,
反应 102.0h,
以200 mg的产率得到(1R,4R,5R,8R,13R,14R,17R,18R,19R)-11-[[(1R,4R,5R,8R,13R,14R,17R,18R,19R)-4,5,9,9,13,20,20-heptamethyl-10-oxo-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracos-11-en-11-yl]amino]-4,5,9,9,13,20,20-heptamethyl-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracos-11-en-10-one