3-(p-Hydroxy-phenyl)-Δ2-pyrazolin   、                                                                                      
2,4-二氯苯乙酸                                                                                                                                                              在
                                                                                                                                                                                 
2-(2,4-dichloro-phenyl)-1-[3-(4-hydroxy-phenyl)-4,5-dihydro-pyrazol-1-yl]-ethanone                                                                                                                                  作用下,
                                                                                                                                                                                                                            以to give the final compound 2-(2,4-dichloro-phenyl)-1-[3-(4-hydroxy-phenyl)-4,5-dihydro-pyrazol-1-yl]-ethanone (33)的产率得到2-(2,4-dichloro-phenyl)-1-[3-(4-hydroxy-phenyl)-4,5-dihydro-pyrazol-1-yl]-ethanone