methyl 2-ethoxycarbonylorthoacetate   、                                                                                      
溶剂黄146   、                                                                                      
2,4,6-trimethyl-3-nitrophenylhydrazine                                                                                                                                                              在
                                                                                                                                                                                 
甲醇                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 18.33h,
                                                                                                                以14.4 g of β-methoxy-β-(3-nitro-2,4,6-trimethylphenylhydrazino)-acrylic acid ethyl ester of melting point 82° - 83° C. are obtained的产率得到β-Methoxy-β-(3-nitro-2,4,6-trimethylphenylhydrazino)acrylsaeureethylester