Use of dissolving metals in the partial reduction of pyridines: formation of 2-alkyl-1,2-dihydropyridines
作者:Timothy J. Donohoe、Andrew J. McRiner、Madeleine Helliwell、Peter Sheldrake
DOI:10.1039/b101662h
日期:——
The partial reduction of a series of electron deficient pyridines to give both 1,2- and 2,5-dihydropyridines is described. The factors that lead to formation of such dihydropyridines are discussed and it was found that, generally, the presence of two activating groups on the pyridine nucleus is optimal. A series of 2-alkyl-1,2-dihydropyridines was prepared using either Birch or sodium naphthalenide reducing conditions and some preliminary derivatisation chemistry has been examined. The identity of three relevant nitrogen containing heterocycles was proven by X-ray crystallography.
本文介绍了对一系列缺电子吡啶进行部分还原,从而得到 1,2- 和 2,5- 二氢吡啶的过程。讨论了形成这种二氢吡啶的因素,发现一般来说,吡啶核上存在两个活化基团是最佳的。使用桦木或萘化钠还原条件制备了一系列 2-烷基-1,2-二氢吡啶,并对一些初步的衍生化学进行了研究。X 射线晶体学证明了三个相关含氮杂环的身份。