The compounds of the formulae (V) - (X):
wherein R is a group of the sub-formula (a), (b) or (c):
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where Ri is a hydrogen atom or a methyl or ethyl group; R2 is a lower alkyl, lower-alkylaryl or aryl group; and R3 is a -CHR4-CHR4 orCRs=CRs group where R4 is a hydrogen atom or a methyl group and Rs is a hydrogen atom, a methyl group or R4 and R5 together with the carbon atoms to which they are attached form the residue of a phenyl group or of a phenyl group substituted by one or two lower alkyl or lower alkoxyl groups of fluorine, chlorine or bromine atoms; and R1 is a lower alkyl, lower alkenyl, lower alkynyl or aralkyl group; are antibacterial agents. Their preparation and compositions are described.
式 (V) - (X) 的化合物:
其中 R 是子式 (a)、(b) 或 (c) 的基团:
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其中 Ri 是氢原子或甲基或乙基;R2 是低级烷基、低级烷芳基或芳基;其中 R4 是氢原子或甲基,Rs 是氢原子、甲基或 R4 和 R5 与它们所连接的碳原子一起形成苯基或被一个或两个
氟、
氯或
溴原子的低级烷基或低级烷氧基取代的苯基的残基;以及 R1 是低级烷基、低级烯基、低级炔基或芳烷基。本文介绍了它们的制备方法和成分。