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N-ethoxycarbonylhexahydropyridazine

phosgene

→

N-ethoxycarbonyl-N'-chlorocarbonylhexahydropyridazine

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실험 절차

In the same way, 4-[2-(4-chlorobenzyloxy)-5-pyridyl]-1,2-tetramethylenetriazolidine-3,5-dione is prepared by reacting N-ethoxycarbonylhexahydropyridazine with phosgene to give N-ethoxycarbonyl-N'-chlorocarbonylhexahydropyridazine, which is then reacted with 5-amino-2-(4-chlorobenzyloxy)pyridine.

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