Carbohydrates to Functionalized Pyridines: A New Synthetic Approach via Enol-Driven Ring Transformations
作者:Lal Yadav、Ankita Rai、Vijai Rai、Chhama Awasthi
DOI:10.1055/s-2008-1042760
日期:——
An expeditious synthetic protocol for polyhydroxyalkyl-pyridines and their 3-amino/mercapto-2-pyridinone analogues using unprotected aldoses as biorenewable resources is reported. The synthesis involves enol-driven Michael-type addition of lactones/ ketones to aldose-derived 1,3-oxazin-2-ones followed by decarboxylative ring transformation to yield various novel polyhydroxyalkylpyridines. This is a
报告了使用未受保护的醛糖作为生物可再生资源的多羟基烷基吡啶及其 3-氨基/巯基-2-吡啶酮类似物的快速合成方案。该合成包括烯醇驱动的迈克尔型内酯/酮与醛糖衍生的 1,3-恶嗪-2-酮的加成,然后脱羧环转化以产生各种新型聚羟基烷基吡啶。这是在无溶剂微波辐射条件下进行的一锅纳米粘土(K-10 粘土)催化过程。