Anchimeric‐Assisted Spontaneous Hydrolysis of Cyanohydrins Under Ambient Conditions: Implications for Cyanide‐Initiated Selective Transformations
作者:Jayasudhan Reddy Yerabolu、Charles L Liotta、Ramanarayanan Krishnamurthy
DOI:10.1002/chem.201701497
日期:2017.6.27
spontaneous hydrolysis is affected by an intramolecular proton transfer and an intramolecular 5-exo-dig attack, but with a twist. In the case of β-keto acids, the hydrolysis is mediated by the neighboring carboxylic acid group only at pH values less than 7, whereas in the case of γ-keto-alcohols the hydrolysis is mediated by the neighboring hydroxyl group only at pH values greater than 7. The results, in combination
从有机化学尤其是益生元化学的角度来看,腈/氰化物的水解是重要的。本文中,我们报告说,氰化物与氰化物与β-酮酸和γ-酮醇反应生成的氰醇在环境条件(水介质,室温和pH范围)下自发水解。自发水解受分子内质子转移和分子内5- exo的影响-dig攻击,但有一些转折。在β-酮酸的情况下,水解仅在pH值小于7时由相邻的羧酸基团介导,而在γ-酮醇的情况下,水解仅在pH值下由相邻的羟基基团介导大于7。该结果与先前的研究相结合,对氰化物引发的益生元系统化学的选择性转化产生了影响。