IMIDAZOTHIAZOLE DERIVATIVES AND PROCESS FOR PRODUCING THE SAME

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The present invention relates to compounds of formula (I) and a process for producing the same. In formula (I), X represents a halogen atom, and R 1 represents a group -COR 2 wherein R 2 represents a group OM or C1-12 alkyloxy wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal, or a quaternary ammonium. The use of this compound as a synthetic intermediate can realize the production of carbapenem derivatives having potent antimicrobial activity in an efficient and safe manner at low cost.