Acetic Anhydride–Acetic Acid as a New Dehydrating Agent of Aldoximes for the Preparation of Nitriles: Preparation of 2-Cyanoglycals
作者:Henok H. Kinfe、Tommy F. Mabasa、Jackie Mabasa、Mthokozisi Simelane、Banele Vatsha、Banothile C.E. Makhubela
DOI:10.1055/s-0040-1708007
日期:2020.6
Herein, we report a combination of Ac2O and AcOH as new and efficient dehydrating agent of aldoximes for the synthesis of 2-cyanoglycals. In comparison to the conventional dehydrating system of Ac2O-base (such as NaOH, NaOAc and K2CO3), the current protocol provides superior yields and faster reaction rates. The scope and limitations of the dehydrating system are investigated.
Glycals 是一种 1,2-不饱和碳水化合物,是合成各种支架的通用构件。尽管它们有可能在面向多样性的合成中用作合适的前体,但在合成和衍生化方面对 2-氰基糖的探索较少。在此,我们报告了 Ac2O 和 AcOH 的组合作为用于合成 2-氰基的新型高效醛肟脱水剂。与传统的 Ac2O 碱脱水系统(如 NaOH、NaOAc 和 K2CO3)相比,当前的协议提供了更高的产量和更快的反应速率。研究了脱水系统的范围和局限性。