(1S,2S,3R,4S,5R,8R,9S,10R,13S)-4-acetoxy-2-benzoyloxy-5,20-epoxy-1-hydroxy-9,10-[(1S)-2-propenylidenedioxy]tax-11-en-13-yl (2R,3S)-3-(tert-butoxycarbonylamino)-3-(5-ethyl-2-pyridyl)-2-triisopropylsilyloxypropionate 在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
以85%的产率得到(1S,2S,3R,4S,5R,8R,9S,10R,13S)-4-acetoxy-2-benzoyloxy-5,20-epoxy-1-hydroxy-9,10-[(1S)-2-propenylidenedioxy]tax-11-en-13-yl (2R,3S)-3-(tert-butoxycarbonylamino)-3-(5-ethyl-2-pyridyl)-2-hydroxypropionate