申请人:Ono Pharmaceutical Co., Ltd.
公开号:US06534658B1
公开(公告)日:2003-03-18
Oxadiazole derivatives represented by formula (I):
(wherein R1 represents a hydrogen atom or an amino-protective group; R2, R3, and R4 each independently represents an alkyl group, a cycloalkyl group, a phenyl group which may be substituted, or a 3,4-methylenedioxyphenyl group, or R3 and R4 are taken together to represent a C2-6 alkylene group), a process of producing the same, and a process for producing oxadiazole derivatives represented by formula (II):
(wherein all symbols have the same meanings as described above) using the above derivative.
According to the invention, the compound represented by formula (II) is produced through fewer steps in a high yield.
氧代唑衍生物由以下公式(I)表示:(其中R1代表氢原子或氨基保护基团;R2、R3和R4分别表示烷基基团、环烷基基团、苯基基团(可能被取代),或3,4-亚甲二氧基苯基基团,或R3和R4一起表示C2-6烷基基团),制备该衍生物的方法,以及使用上述衍生物制备由以下公式(II)表示的氧代唑衍生物的方法:(其中所有符号的含义与上述描述相同)。根据本发明,通过较少的步骤以高产率生产由公式(II)表示的化合物。