Nickel–palladium-catalyzed hydroamination/cyclization of sulfur-substituted 1,6-diynes with secondary amines
作者:Hayami Nagata、Yuko Sugimoto、Yukiteru Ito、Miki Tanaka、Mitsuhiro Yoshimatsu
DOI:10.1016/j.tet.2013.12.049
日期:2014.2
Hydroamination/cyclizations of sulfur-substituted 1,6-diynes catalyzed by nickel or nickel–palladium in DMSO were examined. Pyrroles 2a–l and furans 5a–i bearing various secondary amines were obtained in high yields. The organosulfanylmethyl group on pyrroles was easily oxidized with ceric ammonium nitrate to produce the pyrrolecarboxaldehyde and corresponding acetal.
考察了镍或镍钯在DMSO中催化的硫取代的1,6-二炔的加氢胺化/环化反应。高产率地获得了带有各种仲胺的吡咯2a – l和呋喃5a – i。吡咯上的有机硫烷基甲基很容易被硝酸铈铵氧化,生成吡咯甲醛和相应的缩醛。