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.
式 (I) 所代表的噁二唑衍
生物:
(其中R1代表氢原子或
氨基保护基;R2、R3和R4各自独立地代表烷基、环烷基、可被取代的苯基或3,4-亚甲基二氧苯基,或R3和R4合起来代表C2-6亚烷基)的噁二唑衍
生物,以及利用上述衍
生物生产由式(II)代表的噁二唑衍
生物的工艺:
(其中所有符号的含义与上述相同)使用上述衍
生物的工艺。
根据本发明,式(II)代表的化合物的生产步骤较少,产率较高。