3,3-dibromoacrylaldehyde   、                                                                                      
(1R,2S,4R,5R,8R,9S,11R)-9-formyl-5-methyl-2-[[(2R,5R)-5-methylmorpholin-2-yl]oxymethyl]-13-propan-2-yltetracyclo[7.4.0.02,11.04,8]tridec-12-ene-1-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 sodium cyanoborohydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (1R,2S,4R,5R,8R,9S,11R)-2-[[(2R,5R)-4-(3,3-difluoroprop-2-enyl)-5-methylmorpholin-2-yl]oxymethyl]-9-formyl-5-methyl-13-propan-2-yltetracyclo[7.4.0.02,11.04,8]tridec-12-ene-1-carboxylic acid