Je. Semple et al., New synthetic technology for efficient construction of alpha-hydroxy-beta-amino amides via the Passerini reaction, ORG LETT, 2(18), 2000, pp. 2769-2772
The Passerini reaction of N-protected amino aldehydes, isonitriles, and TFA
using pyridine-type bases proceeds under mild conditions and directly affo
rds alpha-hydroxy-beta-amino amide derivatives in moderate to high yields.
These adducts are readily hydrolyzed to alpha-hydroxy-beta-amino carboxylic
acids. Application of these key intermediates to concise syntheses of P-1-
alpha-ketoamide protease inhibitors is illustrated.