(3E,5E,7E,11E,13E)-(9R,10R,17S,18S,20S)-20-Hydroxymethyl-18-methoxy-10-((2R,3S,4R,5S,6S)-5-methoxy-6-methyl-3,4-bis-triethylsilanyloxy-tetrahydro-pyran-2-yloxy)-3,5,7,9,13-pentamethyl-17-triethylsilanyloxy-oxacycloicosa-3,5,7,11,13-pentaen-2-one 在
吡啶 、
氟化氢吡啶 作用下,
以
四氢呋喃 为溶剂,
反应 7.0h,
以100%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-20-hydroxymethyl-18-methoxy-3,5,7,9,13-pentamethyl-oxacycloicosa-3,5,7,11,13-pentaen-2-one