申请人:DAIICHI PHARMACEUTICAL CO., LTD.
公开号:EP0829473A1
公开(公告)日:1998-03-18
This invention is to provide a compound represented by the following formula (I) [ in the formula, n is an integer of 2 to 5; R1 represents a hydrogen atom or a substituent group represented by the following formula R1, in which Ra, Rb and Rc each represents a phenyl, phenylmethyl or naphthyl group (which may be substituted with at least one substituent group selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a halogen atom and a nitro group), a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; and R2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, with the proviso that a compound, in which n is 2, R1 is a hydrogen atom and R2 is an ethyl group, is excluded] and a compound represented by the following formula (II) useful as an antibacterial agent which is obtained by the compound of folmula (I), and also to provide a novel synthetic process for the inexpensive, short-step and industrially advantageous production thereof.
本发明旨在提供一种由下式(I)代表的化合物[ 式中,n 为 2 至 5 的整数;R1代表氢原子或下式 R1 所代表的取代基,其中 Ra、Rb 和 Rc 分别代表苯基、苯基甲基或萘基(可被至少一个选自具有 1 至 4 个碳原子的烷基、具有 1 至 4 个碳原子的烷氧基、卤素原子和硝基组成的组的取代基取代)、氢原子或具有 1 至 4 个碳原子的烷基;和 R2 代表氢原子或具有 1 至 4 个碳原子的烷基,但不包括 n 为 2、R1 为氢原子和 R2 为乙基的化合物]以及下式(II)所代表的化合物,该化合物可用作抗菌剂,由对开式(I)的化合物获得,同时还提供一种新的合成工艺,用于生产成本低廉、步骤短且具有工业优势的抗菌剂。