t-butyl 2-[N-[2-(3-nitrobenzylidene)-3-oxobutanoyl]amino]acetate   、                                                                                      
ethyl 3-amino-3-phenylprop-2-enoate                                                                                                                                                              在
                                                                                                                                                                                 silica gel                                                                                                                                  作用下,
                                                                                                                                                                                        反应 16.0h,
                                                                                                                以whereby 98 mg (22%) of the captioned compound was obtained as an oily material的产率得到t-butyl 2-[N-[1,4-dihydro-2-methyl-5-methoxycarbonyl-4-(3-nitrophenyl)-6-phenylpyridine-3-carbonyl]amino]acetate