(4R,4aS,7R,7aR)-4-(3,3-dimethylbut-1-enyl)-7-methoxy-2,2-dimethyl-4,4a,7,7a-tetrahydrofuro[3,2-d][1,3]dioxin-6-one   、                                                                                      
3-amino-1-(3,5-difluorobenzyl)-1,3,4,5-tetrahydro-1-benzazepin-2-one hydrochloride                                                                                                                                                              在
                                                                                                                                                                                 
sodium 2-ethylhexanoic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                生成                                                 N-[(R)-1-(3,5-difluorobenzyl)-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepin-3-yl]-2-[(4R,5S,6R)-6-((E)-3,3-dimethylbut-1-enyl)-5-hydroxy-2,2-dimethyl-1,3-dioxinan-4-yl]-2(R)-methoxyacetamide   、                                                                                             N-[(S)-1-(3,5-difluorobenzyl)-2-oxo-2,3,4,5-tetrahydro-1H-1-benzazepin-3-yl]-2-[(4R,5S,6R)-6-((E)-3,3-dimethylbut-1-enyl)-5-hydroxy-2,2-dimethyl-1,3-dioxinan-4-yl]-2(R)-methoxyacetamide