6-(5-bromopentyloxy)-3-(4-methoxyphenyl)-2-methylquinazolin-4(3H)-one   、                                                                                      
(2S)-N-(4-hydroxy-5-methoxy-2-nitrobenzoyl)pyrrolidine-2-carboxaldehyde diethyl thioacetal                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                                                        以85%的产率得到(2S)-N-{4-{5-[3-(4-methoxyphenyl)-2-methyl-4-oxo-3,4-dihydro-6-quinazolin yl]oxypentyloxy}-5-methoxy-2-nitrobenzoyl}pyrrolidine-2-carboxaldehyde diethyl dithioacetal