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
描述了在无金属条件下以肟肟作为结构单元生成吡啶的方法。碘化铵已被证明是肟氮键还原和随后的缩合反应的高效促进剂,因此在转化中起着双重作用。尽管在化学计量的碘化铵的帮助下,肟肟,苯甲醛和1,3-二羰基肟的三组分反应进展顺利,但通过使用催化引发剂,肟和丙烯醛的缩合反应可提供取代的吡啶。通过该方案,以中等至优异的产率产生了对许多官能团具有耐受性的取代吡啶产物。