5-tert-butyl-2-(1-cyano-2,2-dimethyl-propylidene)-3-methyl-6-oxo-4c-phenyl-[1,3]oxazinane-5r-carbonitrile                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 2-Cyano-2-{[(2-cyano-3,3-dimethyl-butyryl)-methyl-amino]-phenyl-methyl}-3,3-dimethyl-butyric acid methyl ester