Derivatives of 2-substituted-6-phenyl-3(2H)pyridazinone, their production and pharmaceutical compositions containing them
申请人:MORISHITA PHARMACEUTICAL CO. LTD.
公开号:EP0030835A1
公开(公告)日:1981-06-24
Although known 6-phenyl-3(2H)-pyridazinone derivatives possess a strong anti-peptic ulcer activity, they do not all exhibit activity over long periods of time and can produce unfavourable side effects. These difficulties are now overcome by derivatives represented by the formula (I):
wherein R', R2 and R3 independently represent a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; R' and R' independently represent a hydrogen atom or an alkyl group; m represents an integer of 1 to 3; n represents 0 or an integer of from 1 to 3; Z represents -CH2-, -0- or -S-; X represents -S-R6 or -N"H-R', wherein R6 represents a lower alkyl group and R' represents a hydrogen atom, a lower alkyl or a propargyl group, and the carbon atoms at positions 4 and 5 of the heterocyclic ring of the formula (I), to which R' and R' are bonded respectively, are joined by either a single or a double carbon-carbon bond; and acid addition salts thereof; with the proviso that where Z is -0- or -S-, the carbon atoms at positions 4 and 5 joined by a double bond and n represents an integer of 1 to 3. These compounds have therapeutical activity against peptic ulcers.
虽然已知的 6-苯基-3(2H)-哒嗪酮衍生物具有很强的抗消化性溃疡活性,但它们并不都能长期保持活性,而且会产生不利的副作用。现在,由式(I)表示的衍生物克服了这些困难:
其中 R'、R2 和 R3 分别代表氢原子、卤素原子、低级烷基或低级烷氧基;R'和 R'分别代表氢原子或烷基;m 代表 1 至 3 的整数;n 代表 0 或 1 至 3 的整数;Z 代表 -CH2-、-0- 或 -S-;X代表-S-R6或-N "H-R',其中R6代表低级烷基,R'代表氢原子、低级烷基或丙炔基,且R'和R'分别键合的式(I)杂环第4位和第5位的碳原子通过单碳碳键或双碳碳键连接;及其酸加成盐;但其中 Z 为-0-或-S-时,第 4 位和第 5 位的碳原子以双键连接,n 为 1 至 3 的整数。这些化合物对消化性溃疡具有治疗活性。