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No abstract

A novel and simple protocol: the direct amination of 4,5-dichloropyridazinones can be carried out in hydrazine hydrate under mild conditions. 4-Chloro-5-hydrazinopyridazin-3-ones serves as a key intermediate in this reduction.

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39 sets of solutions were compounded from 2-[2-(Dimethylamino)ethoxy]ethanol (DMAEE), 2-(2-Aminoethoxy)ethanol (DGA) and 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU). There solutions were tested relevant to the stirred reactor, at 303K~323K, 0.1MPa, to establish their absorption performance. An equation was utilized to model the absorption curve and the simulation results agreed well the experiments. The relevance of temperature and composition of solution with absorbed performance were revealed on the basis of comparison and analysis.