Brønsted Acid Catalyzed Dynamic Kinetic Resolution of Azlactones for the Synthesis of Aryl Glycine Derivatives
作者:Liu-Zhu Gong、Chao Wang、Hong-Wen Luo
DOI:10.1055/s-0030-1259711
日期:2011.4
The dynamic kinetic resolution of C4-aryl azlactones with alcohols was investigated by employing Brønsted acid catalysis. The reaction provided an efficient complementary approach to access chiral aryl glycine derivatives with excellent yields (up to 99%) and enantioselectivities (up to 96% ee).
Study of a new ‘chiral proton’ organocatalyst with hydrolase activity: application in azlactone racemic dynamic resolution
作者:Ángel L. Fuentes de Arriba、Omayra H. Rubio、Luis Simón、Victoria Alcázar、Laura M. Monleón、Francisca Sanz、Joaquin R. Morán
DOI:10.1016/j.tetasy.2017.04.012
日期:2017.6
For the first time, a 1,3-ketoenol system is described as an acid catalyst with hydrolytic activity. The combination of an enol and a pyridine/benzimidazole supported on a benzofuran skeleton allowed the creation of a novel bifunctional organocatalyst, which has been applied in azlactone racemic dynamic resolution. In spite of the moderate enantioselectivities obtained, the catalyst constitutes a novel concept in the field of chiral Brensted acid catalysis. (C) 2017 Elsevier Ltd. All rights reserved.