3-tert-Butoxycarbonylamino-2,2-dimethyl-propionic acid 4-{(1S,2R,3R)-1-chloro-3-[(E)-(3S,10R,16S)-10-(3-chloro-4-methoxy-benzyl)-3-isobutyl-6,6-dimethyl-2,5,9,12-tetraoxo-1,4-dioxa-8,11-diaza-cyclohexadec-13-en-16-yl]-2-hydroxy-butyl}-phenyl ester                                                                                                                                                              在
                                                                                                                                                                                 
盐酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以95%的产率得到pentanoic acid, N-[(2E,5S,6S,7R,8S)-8-[4-(3-amino-2,2-dimethyl-1-oxopropoxy)phenyl]-8-chloro-5,7-dihydroxy-6-methyl-1-oxo-2-octenyl]-3-chloro-O-methyl-D-tyrosyl-2,2-dimethyl-β-alanyl-2-hydroxy-4-methyl, (3->1
5)-lactone, monohydrochloride, (2S)-