PROBLEM TO BE SOLVED: To provide: a process of synthesizing dasatinib, which is used in treatment of chronic myelogenous leukemia (CML) and intermediates useful for its production.SOLUTION: A process of synthesizing dasatinib, which is represented by formula (I), includes, e.g., reacting 5-methoxycarbonyl-2-amino-1,3-thiazol, which is represented by formula (X), with 2-methyl-4,6-dichloropyrimidine in an aprotic polar solvent and in the presence of a base.COPYRIGHT: (C)2016,JPO&INPIT【課題】慢性骨髄性白血病(CML)の治療に用いられているダサチニブの合成方法およびその製造に有用な中間体の提供。【解決手段】式(X)で示される5-メトキシカルボニル-2-アミノ-1,3-チアゾールと2-メチル-4,6-ジクロロピリミジンとの反応を非プロトン性極性溶媒中、塩基の存在下に行うこと等により式(I)で表されるダサチニブを合成する方法。【選択図】なし