4-amino-2-morpholinopyrimidine-5-carbaldehyde   、                                                                                      
N-[2-chloro-5-((R)-1-phenyl-ethylcarbamoyl)-phenyl]-malonamic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 
哌啶                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以52.7%的产率得到2-morpholin-4-yl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-6-carboxylic acid [2-chloro-5-((R)-1-phenyl-ethylcarbamoyl)phenyl]amide