N1-(5-acetylpyridin-2-yl)-N2-(5-chloropyridin-2-yl)ethanediamide é uma impureza estrutural identificada em rotas sintéticas envolvendo funcionalização de piridina e acilações de etanediamida. A presença do grupo acetila e do substituinte cloro na posição 5 altera polaridade e influência do logP, resultando em comportamento cromatográfico diferenciado; é detectável por HPLC-UV e por LC-MS com padrão de fragmentação compatível com perda de acetila. Espectroscopia 1H e 13C NMR confirmam padrões de acoplamento aromático característicos. Controle analítico robusto é recomendado para evitar co-eluição com o produto alvo e avaliar estabilidade durante purificação e estocagem.
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![N1-(5-Chloropyridin-2-yl)-N2-((1S,2R,4S)-4- (dimethylcarbamoyl)-2-(5-nitroso-4,5,6,7-tetrahydrothiazolo[5,4- c]pyridine-2-carboxamido)cyclohexyl)oxalamide](https://veeprho.com/wp-content/uploads/2023/02/N1-5-Chloropyridin-2-yl-N2-1S-2R-4S-4-20dimethylcarbamoyl-2-5-nitroso-4-5-6-7-tetrahydrothiazolo-5-4-c-pyridine-2-carboxamido-cyclohexyl-oxalamide.png "N1-(5-Chloropyridin-2-yl)-N2-((1S,2R,4S)-4- (dimethylcarbamoyl)-2-(5-nitroso-4,5,6,7-tetrahydrothiazolo[5,4- c]pyridine-2-carboxamido)cyclohexyl)oxalamide")
