申请人:Takeda Chemical Industries, Ltd.
公开号:US06699995B1
公开(公告)日:2004-03-02
A production method of a compound represented by the formula
wherein R1 and R2 are each a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, R3 is an electron-withdrawing group, and R4, R5 and R6 are each a hydrogen atom or an optionally substituted hydrocarbon group, or a salt thereof, is provided as an industrially advantageous production. method for forming a carbon-carbon bond at the 5-position of oxazole, which method includes reacting a compound represented by the formula
wherein the symbols in the formula are as defined above, or a salt thereof, with a compound represented by the formula
wherein the symbols in the formula are as defined above, or a salt thereof, in the presence of an acid or a base.
提供一种化合物的生产方法,该化合物的化学式为其中R1和R2分别为氢原子、可选择取代的碳氢基团或可选择取代的杂环基团,R3为电子提取基团,R4、R5和R6分别为氢原子或可选择取代的碳氢基团,或其盐。该生产方法在工业上具有优势,用于在噁唑的5位形成碳-碳键,该方法包括在酸或碱的存在下,将化学式中符号定义如上的化合物或其盐与化学式中符号定义如上的化合物或其盐反应。