- Chiral Brønsted acid catalyzed enantioselective hydrophosphonylation of imines: asymmetric synthesis of alpha-amino phosphonates.
Chiral Brønsted acid catalyzed enantioselective hydrophosphonylation of imines: asymmetric synthesis of alpha-amino phosphonates.
Organic letters (2005-06-17)
Takahiko Akiyama, Hisashi Morita, Junji Itoh, Kohei Fuchibe
PMID15957896
RESUMO
[reaction: see text] A cyclic phosphoric acid derivative, derived from (R)-BINOL, was used as a chiral Brønsted acid (10 mol %) in hydrophosphonylation of aldimines with diisopropyl phosphite at room temperature. Alpha-amino phosphonates were obtained with good to high enantioselectivities.
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Sigma-Aldrich
(R)-3,3′-Bis[3,5-bis(trifluoromethyl)phenyl]-1,1′-binaphthyl-2,2′-diyl hydrogenphosphate, 95%