在
                                                                                                                                                                                 
硼烷四氢呋喃络合物                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以18%的产率得到(1S,4R,5R,6R,8R,10S,11R,12S,13R,16R,18S,21R)-18-[(2S)-4-[2-(3,3-difluoroazetidin-1-yl)ethyl]morpholin-2-yl]oxy-8-[(1S)-1-ethoxy-2-hydroxy-2-methylpropyl]-4,6,12,17,17-pentamethyl-9-oxahexacyclo[11.9.0.01,21.04,12.05,10.016,21]docosan-11-ol