A Practical Synthesis of l-Valyl-pyrrolidine-(2R)-boronic Acid:  Efficient Recycling of the Costly Chiral Auxiliary (+)-Pinanediol

Autor: Gibson, F. S., Singh, A. K., Soumeillant, M. C., Manchand, P. S., Humora, M., Kronenthal, D. R.
Zdroj: Organic Process Research & Development; November 2002, Vol. 6 Issue: 6 p814-816, 3p
Abstrakt: A practical synthesis of l-valyl-pyrrolidine-(2R)-boronic acid (1) is detailed. A previously disclosed synthesis of 1 (Snow, R.; Kelly, T. R.; Adams, J.; Coutts, S.; Perry, C. (Boehringer Ingelheim Pharmaceuticals, Inc.). WO 93/10127, 1993) was significantly improved by developing an efficient process for recycling the costly chiral auxiliary (+)- pinanediol.
Databáze: Supplemental Index