Synthesis of pyrrol-pyridazyl-triazolyl-pyridines via Cu(I)-catalyzed azide-alkyne 1,3-dipolar cycloaddition reaction
作者:Wu Yang、Leixia Fu、Jie Wu、Chuanjun Song
DOI:10.1080/00397911.2016.1185123
日期:2016.7.2
ABSTRACT Conjugated alternative donor–acceptor type pyrrol-pyridazyl-triazolyl-pyridine N-heterocyclic systems were synthesized via Cu(I)-catalyzed azide-alkyne 1,3-dipolar cycloadditionreaction of pyrrol-pyridazylacetylene with azidopyridines. GRAPHICAL ABSTRACT
A new method for the synthesis of 3-halo-6-(N-tosyl-2-pyrrolyl)pyridazine 7 was developed. Suzuki cross-coupling reactions of 7 with arylboronic acids and in situ de-tosylation gave a variety of novel 3-aryl-6-(2-pyrrolyl)pyridazines. It found that protection of the pyrrolyl moiety was necessary for efficient coupling reaction.