7-(piperidin-4-ylamino)-1-methyl-3-ortho-tolyl-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one   、                                                                                      
2-溴乙醇   、                                                                                      
三乙胺                                                                                                                                                              在
                                                                                                                                                                                 silica gel   、                                                                                                  Methanol isopropylamine ethyl acetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯   、                                                                                         
N,N-二甲基丙烯基脲                                                                                  为溶剂,
                                                                                                                                                    反应 17.0h,
                                                                                                                以to give 70 mg (52%) of 7-[1-(2-hydroxyethyl)piperidin-4-ylamino]-1-methyl-3-ortho-tolyl-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one的产率得到7-[1-(2-hydroxyethyl)piperidin-4-ylamino]-1-methyl-3-ortho-tolyl-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one