Short and efficient preparations of isoxazole-3-carboxylic acid and imino-oxopentanoic acid potent precursors of 4-hydroxyisoleucine
摘要:
Herein, we describe short and efficient syntheses of isoxazole-3-carboxylic acid 3a and imino-oxopentanoic acid 8 achiral precursors of 4-hydroxyisoleucine. The developed procedures involve readily available and cheap starting materials and can easily be transposed to the large scale. (c) 2006 Elsevier Ltd. All rights reserved.