tert-butyl 7-[8-(tert-butoxycarbonylamino)-7-fluoro-3-[[3-(hydroxymethyl)cyclobutoxy]carbonylamino]-6-isoquinolyl]-8-methyl-2,3-dihydropyrido[2,3-b][1,4]oxazine-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                生成                                                 (1r,3r)-3-(hydroxymethyl)cyclobutyl (8-amino-7-fluoro-6-(8-methyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-7-yl)isoquinolin-3-yl)carbamate   、                                                                                             (1s,3s)-3-(hydroxymethyl)cyclobutyl (8-amino-7-fluoro-6-(8-methyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-7-yl)isoquinolin-3-yl)carbamate