Enantioselective Synthesis of α-Bromonitroalkanes for Umpolung Amide Synthesis: Preparation of tert -Butyl ((1 R )-1-(4-(benzyloxy)phenyl)-2-bromo-2-nitroethyl)carbamate

α-溴硝基烷的对映选择性合成用于酰胺合成：制备叔丁基 ((1 R )-1-(4-(苄氧基)苯基)-2-溴-2-硝基乙基)氨基甲酸酯