tert-butyl 4-[4-{[(2R)-4-methoxy-2-methyl-4-oxobutanoyl]amino}-6-(pyrazin-2-ylamino)-2,4'-bipyridin-2'-yl]piperazine-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
水   、                                                                                                  sodium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以94%的产率得到(3R)-4-{[2'-[4-(tert-butoxycarbonyl)piperazin-1-yl]-6-(pyrazin-2-ylamino)-2,4'-bipyridin-4-yl]amino}-3-methyl-4-oxobutanoic acid sodium salt