INTERMEDIATE OF 6-SUBSTITUTED-1-METHYL-1-H-BENZIMIDAZOLE DERIVATIVE AND METHOD FOR PRODUCING SAME
申请人:Sankyo Company, Limited
公开号:EP1798216A1
公开(公告)日:2007-06-20
[Subject]
The object of the present invention is to provide new intermediates (IIa) and (III) of the 6-substituted-1-methyl-1-H-benzimidazol derivatives (I) which are publicly known pharmaceutically active ingredients, and a preparation procedure suitable for a large scale synthesis of N-(5-substituted-2-nitrophenyl)-N-methylamines (II) which are synthetic intermediates.
Additionally, another object of the present invention is to provide an efficient procedure for the preparation of the 6-substituted-1-methyl-1-H-benzimidazole derivative (I) from said synthetic intermediates (II) in a shorter number of steps.
[Measures to solve the subject]
The present invention relates to a procedure for the preparation of a compound (I) represented by the following formula and synthetic intermediates of said compound (I).
(In the above reaction scheme, R2 represents a phenyl group which may optionally be substituted with substituents such as a C1-C6 alkyl group or the like, and X represents an oxygen atom, a sulfur atom or a nitrogen atom).
主题
本发明的目的是提供6-取代-1-甲基-1-H-苯并咪唑衍生物(I)的新中间体(IIa)和(III),它们是公开已知的药物活性成分,以及一种适合大规模合成N-(5-取代-2-硝基苯基)-N-甲基胺(II)的合成中间体的制备程序。
此外,本发明的另一个目的是提供一种高效的程序,以较少的步骤从上述合成中间体(II)制备 6-取代-1-甲基-1-H-苯并咪唑衍生物(I)。
[解决措施]
本发明涉及一种制备下式代表的化合物(I)和所述化合物(I)的合成中间体的程序。
(在上述反应方案中,R2 代表苯基,可任选被 C1-C6 烷基等取代基取代,X 代表氧原子、硫原子或氮原子)。