(3'R)-5-methoxy-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one                                                                                                                                                              在
                                                                                                                                                                                 
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
(2'R,3'R)-5-methoxy-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one   、                                                                                             
(2'S,3'R)-5-methoxy-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one