在
氟化氢吡啶 作用下,
以
四氢呋喃 为溶剂,
反应 48.0h,
以70%的产率得到(3E,5E,7E,11E,13E)-(9R,10R,17S,18S,20S)-10-((2R,3S,4S,5R,6S)-3,4-Dihydroxy-5-methoxy-6-methyl-tetrahydro-pyran-2-yloxy)-17-hydroxy-18-methoxy-20-methoxymethyl-3,5,7,9,13-pentamethyl-oxacycloicosa-3,5,7,11,13-pentaen-2-one