6-(4,5-Dihydro-3H-pyrrol-2-yl)-6-hydroxy-2,3-dimethyl-5,6-dihydro-1H-cyclopenta[b]pyrrol-4-one                                                                                                                                                              在
                                                                                                                                                                                 
三苯基膦                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈   、                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 2,3-Dimethyl-6-pyrrolidin-(2Z)-ylidene-5,6-dihydro-1H-cyclopenta[b]pyrrol-4-one   、                                                                                             2,3-Dimethyl-6-pyrrolidin-(2E)-ylidene-5,6-dihydro-1H-cyclopenta[b]pyrrol-4-one