tert-butyl 2-oxo-3-(2-oxo-2-propan-2-yloxyethylidene)indole-1-carboxylate   、                                                                                      
α-(3-chloro)-N-phenylnitrone                                                                                                                                                              在
                                                                                                                                                                                 1,1'-((1R,2R)-cyclohexane-1,2-diyl)bis(3-(3,5-bis(trifluoromethyl)phenyl)thiourea)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
正己烷                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以67%的产率得到1-tert-butyl (3R,3'R,5'R)-5'-isopropyl 3'-(3-chlorophenyl)-2-oxo-2'-phenylspiro[indoline-3,4'-isoxazolidine]-1,5'-dicarboxylate