(R)-3-cyclopentenyl-4-ethyloxazolidin-2-one   、                                                                                      
ethyl 4-phenyl-2-oxobut-3-enoate                                                                                                                                                              在
                                                                                                                                                                                 tris(6,6,7,7,8,8-heptafluoro-2,2-dimethyl-3,5-octadionato)europium(III)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
环己烷                                                                                  为溶剂,
                                                                                                                                                    反应 60.0h,
                                                                                                                生成                                                 
(4S,4aR,7aR)-7a-[(4R)-4-ethyl-2-oxo-1,3-oxazolidin-3-yl]-4-phenyl-4,4a,5,6,7,7a-hexahydrocyclopenta[b]pyran-2-carboxylic acid ethyl ester   、                                                                                             (4R,4aR,7aR)-7a-[(4R)-4-ethyl-2-oxo-1,3-oxazolidin-3-yl]-4-phenyl-4,4a,5,6,7,7a-hexahydrocyclopenta[b]pyran-2-carboxylic acid ethyl ester