甲磺酸甲酯   、                                                                                      
1-(2-hydroxyethyl)-3,4,5,6-tetrahydropyrimidine-2-thione                                                                                                                                                                                              以
                                                                                         
乙醇   、                                                                                         
甲基叔丁基醚                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以yields 145.7 g of 1-(2-hydroxyethyl)-2-methylthio-3,4,5,6-tetrahydropyrimidine mesylate, melting point 61.7°-62.2° C.的产率得到1-(2-hydroxyethyl)-2-methylthio-3,4,5,6-tetrahydropyrimidine mesylate