3-(羟甲基)氧杂环丁烷-3-甲酸   、                                                                                      ethyl (R)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺   、                                                                                                  N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 ethyl (S)-4-(3-(hydroxymethyl)oxetane-3-carbonyl)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxylate