3-hexyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-2,4(1H,3H)-dione   、                                                                                      
sodium;hydride   、                                                                                      
溴乙酸乙酯                                                                                                                                                                                              以
                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                                                        以Then 1.2 g of 1-ethoxycarbonylmethyl-3-hexyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-2,4(1H,3H)-dione was obtained in a yield of 77%的产率得到1-ethoxycarbonylmethyl-3-hexyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-2,4(1H,3H)-dione