Catalyst functional group cooperativity in the amino acid-catalysed nitroaldol condensation reaction
Makaleler > Tam Makale · 2012
Yazarlar: Leman ALKAN, Stephen Thomas ASTLEY
RESEARCH ON CHEMICAL INTERMEDIATES, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2012, cilt 39, ss 3407-3415
DOI: 10.1007/s11164-012-0853-x
Özet
Several amino acids and their derivatives have been evaluated as organic catalysts for the nitroaldol reaction. It was found that when an unprotected amino group and an unprotected carboxylate group were present in the organocatalyst, both the nitroaldol reaction and subsequent elimination could occur to afford nitroalkenes from aromatic aldehydes and nitromethane. The best results were obtained by use of gamma-amino acids derived from l-glutamine. It is suggested that the amino group is important for intermediate Schiff base formation and that the free carboxylate group facilitates the elimination step.