This invention relates to novel thiazolo[3,2-a]benzoimidazole derivatives represented by the following general formula (I). The compounds provided by the invention act specifically on metabotropic glutamate receptors and are used as medicaments. The invention also provides novel compounds useful as intermediates for the synthesis of the compounds of the invention. 
(Symbols in the formula represent the following meanings. R1: carbamoyl, carbonyl, oxy, amino, carbonylamino or the like which may be substituted; R2: hydrogen, lower alkyl or the like; and R3, R4 and R5: hydrogen, lower alkyl and the like which may be the same or different from one another.)
                            本发明涉及以下通式(I)所表示的新型
噻唑并[3,2-a]
苯并咪唑衍
生物。该发明提供的化合物特异地作用于代谢型谷
氨酸受体,并可用作药物。该发明还提供了新型化合物,用于合成该发明化合物的中间体。(公式中的符号表示以下含义:R1:可被取代的
氨基甲酰基,羰基,氧基,
氨基,羰基
氨基或类似物;R2:氢,低级烷基或类似物;R3、R4和R5:氢,低级烷基或类似物,可以相同也可以不同。)