(R)-{6-[3-(3-tert-butoxycarbonylamino-propoxy)-phenoxy]-1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-3-yl}-acetic acid   、                                                                                      
盐酸                                                                                                                                                                                              以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以to give {6-[3-(3-amino-propoxy)-phenoxy]-1-hydroxy-1,3-dihydro-benzo[c][1,2]oxaborol-3-yl}-acetic acid (0.580 g, 70%)的产率得到2-(6-(3-(3-aminopropoxy)phenoxy)-1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)acetic acid