Ethyl 5-amino-2-methylsulfanyl-4-(propan-2-ylamino)thieno[2,3-d]pyrimidine-6-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
盐酸   、                                                                                                  sodium nitrite                                                                                                                                  作用下,
                                                                                                                                                                                                                            以76%的产率得到ethyl 10-methylsulfanyl-7-propan-2-yl-2-thia-5,6,7,9,11-pentazatricyclo[6.3.1.04,12]dodeca-1(11),3,5,8(12),9-pentaene-3-carboxylate