ammonium hydroxide   、                                                                                      
7-[4-({(3S)-3-[(Hydroxyamino)carbonyl]-2,2-dimethylthiomorpholinyl}-sulfonyl)phenoxy]-5-heptynyl acetate                                                                                                                                                              在
                                                                                                                                                                                 silica gel   、                                                                                                  
methanol-dichloromethane                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                以to provide 0.09 g (65%) of (3S)-N-hydroxy-4-({4-[(7-hydroxy-2-heptynyl)oxy]phenyl}sulfonyl)-2,2-dimethyl-3-thiomorpholinecarboxamide as a white solid的产率得到(3S)-N-Hydroxy-4-({4-[(7-hydroxy-2-heptynyl)oxy]phenyl}sulfonyl)-2,2-dimethyl-3-thiomorpholinecarboxamide