Enantioselective Organocatalysis of Strecker and Mannich Reactions Based on Carbohydrates
作者:Christian Becker、Christine Hoben、Horst Kunz
DOI:10.1002/adsc.200600370
日期:2007.2.5
Efficient organocatalysts for enantioselective Strecker and Mannichreactions were constructed from glucosamine as a readily accessible chiral scaffold. A variety of aromatic aldimines were subjected to hydrocyanation with good to excellent yield (72–98 %) and, in part, high enantioselectivity (69–95 % ee). Influence of the catalyst architecture on the enantioselectivity obviously arises from restrictions
Enantioselective Addition of Hydrogen Cyanide to Imines Catalyzed by a Chiral (Salen)Al(III) Complex
作者:Matthew S. Sigman、Eric N. Jacobsen
DOI:10.1021/ja980299+
日期:1998.6.1
GOVINDAN, C. K.;TAYLOR, G., J. ORG. CHEM., 1983, 48, N 26, 5348-5354
作者:GOVINDAN, C. K.、TAYLOR, G.
DOI:——
日期:——
Thermal electrocyclic reactions of 2-aza-1,3-butadiene derivatives. A new N-heterocyclic annelation
作者:C. K. Govindan、Grant Taylor
DOI:10.1021/jo00174a036
日期:1983.12
Palladium-Catalyzed CH Activation of N-Allyl Imines: Regioselective Allylic Alkylations to Deliver Substituted Aza-1,3-Dienes
作者:Barry M. Trost、Subham Mahapatra、Martin Hansen
DOI:10.1002/anie.201501322
日期:2015.5.11
mode of activation of an imine via a rare aza‐substituted π‐allyl complex is described. Palladium‐catalyzed C(sp3)H activation of the N‐allyl imine and the subsequent nucleophilic attack by the α‐alkyl cyanoester produced the 1‐aza‐1,3‐diene as the sole regioisomer. In contrast, nucleophilic attack by the α‐aryl cyanoester exclusively delivered the 2‐aza‐1,3‐diene, which was employed in an inverse‐electron‐demand