Ethylisoformanilide, condensation with

Other Access Routes for Symmetrical and Unsymmetrical Thiazolo Ds-es. Other functionally symmetrical reagents such as diethoxymethylacetate (method C), ethoxymethylenediethylmalonate (method D), diphenyl formamidine, and ethylisoformanilide condense with 2-methylthiazoliura to give the trimethine thiazolo dyes. 

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