甲胺   、                                                                                      
[(1S,3R,7S,8S,8aR)-8-[2-[(4R,6R)-3-[[4-(2-hydroxypropan-2-yl)phenyl]methyl]-4-(2-methoxy-2-oxoethyl)-2-oxo-1,3-oxazinan-6-yl]ethyl]-3,7-dimethyl-1,2,3,7,8,8a-hexahydronaphthalen-1-yl] (2S)-2-methylbutanoate                                                                                                                                                                                              以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以85%的产率得到[(1S,3R,7S,8S,8aR)-8-[2-[(4R,6R)-3-[[4-(2-hydroxypropan-2-yl)phenyl]methyl]-4-[2-(methylamino)-2-oxoethyl]-2-oxo-1,3-oxazinan-6-yl]ethyl]-3,7-dimethyl-1,2,3,7,8,8a-hexahydronaphthalen-1-yl] (2S)-2-methylbutanoate