5-Cyano-2-hydroxy-2-methyl-6-morpholin-4-yl-4-(3-nitro-phenyl)-1,2,3,4-tetrahydro-pyridine-3-carboxylic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以85%的产率得到5-Cyano-2-methyl-6-morpholin-4-yl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3-carboxylic acid methyl ester