5-methyl-4-(2-methyl-5-(methylcarbamoyl)phenylamino)pyrrolo[1,2-f][1,2,4]triazine-6-carboxylic acid   、                                                                                      
乙胺盐酸盐                                                                                                                                                              在
                                                                                                                                                                                 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以82%的产率得到N-ethyl-5-methyl-4-(2-methyl-5-(methylcarbamoyl)phenylamino)-pyrrolo[1,2-f][1,2,4]triazine-6-carboxamide