1H-pyrrolo-[1,2-b][1,2,4]triazole compound and its synthetic intermediate, and method of preparing a 1H-1,2,4-trazole-5-yl-acetic acid ester compound

摘要

There is disclosed a 1H-pyrrolo-Ä1,2-bÜÄ1,2,4Ütriazole compound represented by formula (I): wherein R is an alkyl group; R1, R2, R3, R1', R2', and R3' each are a hydrogen atom or an alkyl group; R1 and R2, and R1' and R2' may bond together to form a ring, respectively; R4 is a hydrogen atom or an alkyl group, and X is heterocyclic group, a substituted amino group, or an aryl group. The compound is useful as a photographic cyan coupler. There is also disclosed synthetic intermediates of the compound and a production method of the intermediates.