2-{1-[7-(4-bromo-2-fluoro-phenylamino)-6-fluoro-5-oxo-1,2,3,5-tetrahydro-indolizine-8-carbonyl]-3-hydroxy-azetidin-3-yl}-piperidine-1-carboxylic acid tert-butyl ester                                                                                                                                                              在
                                                                                                                                                                                 
盐酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环   、                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以71.6%的产率得到7-(4-bromo-2-fluoro-phenylamino)-6-fluoro-8-(3-hydroxy-3-piperidin-2-yl-azetidine-1-carbonyl)-2,3-dihydro-1H-indolizin-5-one