Enantioselective addition of Grignard reagents to a 2-thiazolyl nitrone
摘要:
The addition of organomagnesium compounds to the N-benzyl 2-thiazolyl nitrone 1 in the presence of various chiral additives and Lewis acids leads to hydroxylamines 2 in moderate to good enantiomeric excess (up to 74%); the reductive dehydroxylation of these compounds affords enantioenriched alpha-amino 2-alkylthiazoles 3 in good yields (76-66%). (C) 1996 Elsevier Science Ltd