Arenesulfonylheterocycles (I): Synthesis and reactions of 2-benzenesulfonyl-4,5-dichloropyridazin-3-ones with amines
作者:Deok-Heon Kweon、Ho-Kyun Kim、Jeum-Jong Kim、Hyun A. Chung、Yong-Jin Yoon、Woo Song Lee、Sung-Kyu Kim
DOI:10.1002/jhet.5570390129
日期:2002.1
The direct sulfonylation of 4,5-dichloropyridazin-3-ones with some benzenesulfonylchlorides in the presence of base in tetrahydrofuran gave only the corresponding N-sulfonylated product. The reaction of 2-benzenesulfonyl-4,5-dichloropyridazin-3-ones with some aliphatic amines under neutral conditions afforded 5-alkylamino-2-benzenesulfonyl-4-chloropyridazin-3-ones and/or the corresponding N-alkyl