在
三氟化硼乙醚 、
2,3,4-tri-O-acetyl-L-rhamnopyranosyl trichloroacetimidate 作用下,
以
二氯甲烷 为溶剂,
以36%的产率得到(5S,6S,7S,10S,14R,17S,23S,24S,25S,28S,32R,35S)-10,28-bis(ethenyl)-5,10,23,28-tetramethyl-2,20-diazanonacyclo[19.15.0.03,19.05,17.06,14.09,13.023,35.024,32.027,31]hexatriaconta-1(21),2,9(13),19,27(31)-pentaene-7,25-diol