Synthesis of copper(II) complexes of asymmetric resins prepared by attachment of α-amino acids to crosslinked polystyrene

Asymmetric Synthesis of α-Amino Acids an

Asymmetric Synthesis of α-Amino Acids and N-Protected α-Amino Aldehydes by Addition of Chiral Vinyl Anions to Sulfonylimines

✍ Prof. Dr. Manfred Braun; Dipl.-Chem. Kersten Opdenbusch 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 373 KB 👁 1 views

Asymmetric 1,4-Addition of Oxazolones to

Asymmetric 1,4-Addition of Oxazolones to Nitroalkenes by Bifunctional Cinchona Alkaloid Thiourea Organocatalysts: Synthesis of α,α-Disubstituted α-Amino Acids

✍ José Alemán; Andrea Milelli; Silvia Cabrera; Efraim Reyes; Karl Anker Jørgensen 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB

## Abstract An easy and simple synthetic approach to optically active α,α‐quaternary α‐amino acids using asymmetric organocatalysis is presented. The addition of oxazolones to nitroalkenes catalyzed by thiourea cinchona derivatives provides the corresponding α,α‐quaternary α‐amino acid derivatives

Chiral Salen–Aluminum Complexes as Catal

Chiral Salen–Aluminum Complexes as Catalysts for Enantioselective Aldol Reactions of Aldehydes and 5-Alkoxyoxazoles: An Efficient Approach to the Asymmetric Synthesis of syn and antiβ-Hydroxy-α-amino Acid Derivatives

✍ David A. Evans; Jacob M. Janey; Nabi Magomedov; Jason S. Tedrow 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 122 KB 👁 2 views

Chiral Salen–Aluminum Complexes as Catal

Chiral Salen–Aluminum Complexes as Catalysts for Enantioselective Aldol Reactions of Aldehydes and 5-Alkoxyoxazoles: An Efficient Approach to the Asymmetric Synthesis of syn and antiβ-Hydroxy-α-amino Acid Derivatives

✍ David A. Evans; Jacob M. Janey; Nabi Magomedov; Jason S. Tedrow 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 123 KB 👁 2 views