allobetulone 在
劳森试剂 作用下,
以
甲苯 为溶剂,
反应 5.0h,
以74%的产率得到(1R,4R,5R,8R,13R,14R,17R,18R,19R)-10-[[(1R,4R,5R,8R,13R,14R,17R,18R,19R)-4,5,9,9,13,20,20-heptamethyl-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracos-10-en-10-yl]sulfanyl]-4,5,9,9,13,20,20-heptamethyl-24-oxahexacyclo[17.3.2.01,18.04,17.05,14.08,13]tetracos-10-ene