(R)-2-amino-7-(2-bromo-4-fluoro-phenyl)-4-methyl-7,8-dihydro-6H-pyrido[4,3-d]pyrimidine-5-thione   、                                                                                      
(2S,4R)-1-tert-butyl 2-methyl 4-(aminooxy)pyrrolidine-1,2-dicarboxylate                                                                                                                                                              在
                                                                                                                                         
Acetic acid, mercury(2+) salt (2:1)                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以to afford (2S,4R)-1-tert-butyl 2-methyl 4-((Z)—((R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-ylidene)aminooxy)pyrrolidine-1,2-dicarboxylate (172 mg, 570%) as off white solid的产率得到(2S,4R)-1-tert-butyl 2-methyl 4-((Z)-((R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-ylidene)aminooxy)pyrrolidine-1,2-dicarboxylate