General and Scalable Amide Bond Formation with Epimerization-Prone Substrates Using T3P and Pyridine
摘要:
The mild combination of T3P (n-propanephosphonic acid anhydride) and pyridine has been developed for low-epimerization amide bond formation and implemented for the synthesis of a key intermediate to a glucokinase activator. This robust method is general for the coupling of various racemization-prone acid substrates and amines, including relatively non-nucleophilic anilines, and provides amides in high yields with very low epimerization. With easy reaction setup and product isolation, this protocol offers several practical and experimental benefits.
General and Scalable Amide Bond Formation with Epimerization-Prone Substrates Using T3P and Pyridine
作者:Joshua R. Dunetz、Yanqiao Xiang、Aaron Baldwin、Justin Ringling
DOI:10.1021/ol201875q
日期:2011.10.7
The mild combination of T3P (n-propanephosphonic acid anhydride) and pyridine has been developed for low-epimerization amide bond formation and implemented for the synthesis of a key intermediate to a glucokinase activator. This robust method is general for the coupling of various racemization-prone acid substrates and amines, including relatively non-nucleophilic anilines, and provides amides in high yields with very low epimerization. With easy reaction setup and product isolation, this protocol offers several practical and experimental benefits.