Direct N-acetyl enamine formation: lithium bromide mediated addition of methyllithium to nitriles.

Autor: Savarin CG; Department of Process Research, Merck Research Laboratories, Merck & Company, P.O. Box 2000, Rahway, NJ 07065, USA. cecile_savarin@merck.com, Boice GN, Murry JA, Corley E, DiMichele L, Hughes D
Jazyk: angličtina
Zdroj: Organic letters [Org Lett] 2006 Aug 31; Vol. 8 (18), pp. 3903-6.
DOI: 10.1021/ol061318k
Abstrakt: An improved protocol for N-acetyl enamine formation is disclosed which involves LiBr-mediated addition of MeLi to substituted nitriles. The resulting enamides are isolated in high yields and excellent purity which permits subsequent hydrogenation at very low catalyst loading.
Databáze: MEDLINE