3-(3-{4-[6-(tert-butoxycarbonylmethylamino)purin-9-yl]phenyl}ureido)-5-(trifluoromethyl)benzoic acid benzyl ester                                                                                                                                                              在
                                                                                                                                         palladium 10% on activated carbon                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以95%的产率得到3-(3-{4-[6-(tert-butoxycarbonylmethylamino)-purin-9-yl]phenyl}ureido)-5-(trifluoromethyl)benzoic acid