Synthesis of Polysubstituted <i>N</i>-H Pyrroles from Vinyl Azides and 1,3-Dicarbonyl Compounds
作者:Shunsuke Chiba、Yi-Feng Wang、Guillaume Lapointe、Koichi Narasaka
DOI:10.1021/ol702727j
日期:2008.1.1
pyrrole formation by the reaction of vinyl azides with 1,3-dicarbonyl compounds via the 1,2-addition of 1,3-dicarbonyl compounds to 2H-azirine intermediates generated in situ from vinyl azides; (ii) the Cu(II)-catalyzed synthesis of pyrroles from alpha-ethoxycarbonyl vinyl azides and ethyl acetoacetate through the 1,4-addition reaction of the acetoacetate to the vinyl azides. By applying these two methods
提出了四和三取代的NH吡咯的两种合成方法:(i)通过将叠氮化物乙烯基与1,3-二羰基化合物通过1,3-二羰基化合物的1,2-加成反应而形成的热吡咯。由叠氮化乙烯原位生成的叠氮中间体; (ii)通过乙酰乙酸酯与乙烯基叠氮化物的1,4-加成反应,由α-乙氧基羰基乙烯基叠氮化物和乙酰乙酸乙酯的Cu(II)催化的吡咯合成。通过应用这两种方法,可以从相同的乙烯基叠氮化物选择性地制备区域异构的吡咯。