Chemistry Letters, Vol.30, No.1, 54-55, 2001
A novel and practical amination of 4,5-dichloropyridazin-3-ones via reduction with hydrazine hydrate
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.