硼替佐米杂质   、                                                                                      
D-扁桃酸                                                                                                                                                                                              以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                                                        以to yield N-[(1S)-1-benzyl-2-({(1R)-3-methyl-1-[(5R)-4-oxo-5-phenyl-1,3,2-dioxaborolan-2-yl]butyl}amino)-2-oxoethyl]pyrazine-2-carboxamide as a white solid (0.195 g, 80%)的产率得到N-[(1S)-1-benzyl-2-({(1R)-3-methyl-1-[(5R)-4-oxo-5-phenyl-1,3,2-dioxaborolan-2-yl]butyl}amino)-2-oxoethyl]pyrazine-2-carboxamide