Metal-Free Assembly of Polysubstituted Pyridines from Oximes and Acroleins
作者:Huawen Huang、Jinhui Cai、Lichang Tang、Zilong Wang、Feifei Li、Guo-Jun Deng
DOI:10.1021/acs.joc.5b02624
日期:2016.2.19
of N-heterocycles from oximes has been previously well established. In this paper, for the first time a metal-free protocol with the combinational employment of iodine and triethylamine has been demonstrated to be effective to trigger the oxime-based synthesis of pyridines with high chemo-selectivity and wide functional group tolerance. A broad range of functional pyridines were prepared in moderate
Synthesis of polysubstituted pyridines from oxime acetates using NH<sub>4</sub>I as a dual-function promoter
作者:Yujia Xia、Jinhui Cai、Huawen Huang、Guo-Jun Deng
DOI:10.1039/c7ob02471a
日期:——
Pyridine formation with oxime acetates as the building blocks under metal-free conditions is described. Ammonium iodide has proved to be a highly efficient promoter for oxime N–O bond reduction and subsequent condensation reactions, whereby it played a dual-function role in the transformation. While the three-component reaction of oxime acetates, benzaldehydes, and 1,3-dicarbonyls proceeded well with
作者:Justin A. Hilf、Michael S. Holzwarth、Scott D. Rychnovsky
DOI:10.1021/acs.joc.6b01370
日期:2016.11.4
Pyridine rings are common structural motifs found in a number of biologically active compounds, including some top-selling pharmaceuticals. We have developed a new approach to access substituted pyridines. The method aims to provide a reliable synthesis of a diverse range of substituted pyridines through a three-step procedure. Readily available enones are first converted into 1,5-dicarbonyls through