2-(4-(4-Nitrophenoxy)butyl)thiophene   、                                                                                      
N-BOC-2-甲基-L-丝氨酸   、                                                                                      
O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate                                                                                                                                                                                              以
                                                                                         
N,N-二异丙基乙胺                                                                                  为溶剂,
                                                                                                                                                                                        以to yield 280 mg product (62% yield)的产率得到(S)-2-(4-(4-(thiophen-2-yl)butoxy)phenylcarbamoyl)-1-hydroxypropan-2-ylcarbamic acid tertiary butyl ester