Iron-Catalyzed Cyclization of Ketoxime Carboxylates and Tertiary Anilines for the Synthesis of Pyridines
作者:Mi-Na Zhao、Zhi-Hui Ren、Le Yu、Yao-Yu Wang、Zheng-Hui Guan
DOI:10.1021/acs.orglett.6b00326
日期:2016.3.4
Fe-catalyzed N–O bond cleavage of ketoxime carboxylates in the presence of tertiary anilines. The methylene carbon on N,N-dialkylanilines functioned as a source of one-carbon synthon in the reaction. The reaction used readily available starting materials, tolerated various functional groups, and afforded 2,4-disubstituted and 2,4,6-trisubstituted pyridines in good to high yields under mild conditions.
开发了新颖高效的铁催化的酮肟羧酸盐和N,N-二烷基苯胺的环化反应,以合成各种吡啶。在叔苯胺存在下,Fe催化酮肟羧酸酯的N–O键裂解,从而引发了反应。N,N-二烷基苯胺上的亚甲基碳在反应中用作一碳合成子的来源。该反应使用容易获得的起始原料,耐受各种官能团,并在温和条件下以高至高收率得到2,4-二取代和2,4,6-三取代的吡啶。