8-methoxy-2,3-dihydro-1H-benzo[f]chromen-3-ol                                                                                                                                                              在
                                                                                                                                                                                 
copper(l) iodide   、                                                                                                  (R)-2,2'-bis(diphenylphosphanyl)-1,1'-binaphthyl                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚   、                                                                                         
二氯甲烷   、                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                生成                                                 (1S,2S,3R)-ethyl 3-ethyl-6'-methoxy-2'-oxo-2'H-spiro[cyclopentane-1,1'-naphthalene]-2-carboxylate   、                                                                                             
(1R,2R,3S)-ethyl 3-ethyl-6'-methoxy-2'-oxo-2'H-spiro[cyclopentane-1,1'-naphthalene]-2-carboxylate