1.
J Org Chem
; 70(11): 4556-9, 2005 May 27.
Artículo
en Inglés
| MEDLINE
| ID: mdl-15903347
RESUMEN
Chiral Pybox (pyridine-2,6-bis(oxazoline)) ligands can be cleanly and efficiently prepared on polystyrene support via a five-step solid-phase synthetic sequence. Cu(I)-complexed polymer-bound Pybox was used as a catalyst in the first heterogeneously catalyzed asymmetric addition of alkynes to imines. Best enantioselectivity was observed with (t)Bu-substituted oxazolines.