Reactions on a Solid Surface. A Simple, Economical, and Efficient Acylation of Alcohols and Amines over Al<sub>2</sub>O<sub>3</sub>
作者:Veejendra K. Yadav、K. Ganesh Babu
DOI:10.1021/jo035412f
日期:2004.1.1
Al2O3 brings about a rapid acylation of a range of alcohols and amines with acid chlorides and acid anhydrides, respectively. Amines are easily Boc- and Cbz-protected on reaction with Boc-anhydride and Cbz-Cl, respectively. The acylation of phenols is slow enough to allow chemoselective acylation of alcohols and amines in the presence of phenols.
Al 2 O 3分别使多种醇和胺分别与酰氯和酸酐快速酰化。分别与Boc酸酐和Cbz-Cl反应时,胺很容易受到Boc和Cbz保护。酚的酰化足够慢,以允许在酚存在下醇和胺的化学选择性酰化。
A USEFUL METHOD FOR SELECTIVE ACYLATION OF ALCOHOLS USING 2,2′-BIPYRIDYL-6-YL CARBOXYLATE AND CESIUM FLUORIDE
Primary and secondaryalcohols are acylated under mild conditions by the use of 2,2′-bipyridyl-6-yl carboxylates and cesium fluoride. Furthermore, the reaction is successfully applied to selectiveacylation of a primary carbinol group of diols containing primary and secondary carbinol groups or exclusive O-acylation of aromatic amino alcohols.