2-Pyrrolidinemethanol,1-[[5-(hydroxy-1-naphthalenylmethyl)-2-furanyl]carbonyl]-, (2S)-                                                                                                                                                              在
                                                                                                                                                                                 camphor-10-sulfonic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                生成                                                 (3R,5'Z,8aS)-5'-(naphthalen-1-ylmethylidene)spiro[6,7,8,8a-tetrahydro-1H-pyrrolo[2,1-c][1,4]oxazine-3,2'-furan]-4-one   、                                                                                             (3S,5'Z,8aS)-5'-(naphthalen-1-ylmethylidene)spiro[6,7,8,8a-tetrahydro-1H-pyrrolo[2,1-c][1,4]oxazine-3,2'-furan]-4-one