Asymmetric Mannich Synthesis of β-Amino Acids with Two New Stereogenic Centers at the α and β Positions

A Bisphosphepine Ligand with Stereogenic

A Bisphosphepine Ligand with Stereogenic Phosphorus Centers for the Practical Synthesis of β-Aryl-β-Amino Acids by Asymmetric Hydrogenation

✍ Wenjun Tang; Weimin Wang; Yongxiang Chi; Xumu Zhang 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 104 KB 👁 1 views

A Bisphosphepine Ligand with Stereogenic

A Bisphosphepine Ligand with Stereogenic Phosphorus Centers for the Practical Synthesis of β-Aryl-β-Amino Acids by Asymmetric Hydrogenation

✍ Wenjun Tang; Weimin Wang; Yongxiang Chi; Xumu Zhang 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 104 KB 👁 1 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 ⚖ 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

α,β-Dehydro-amino acid residues in the d

α,β-Dehydro-amino acid residues in the design of peptide structures: Synthesis, crystal structure, and molecular conformation of two homologous peptides—N-Ac-Dehydro-Phe-L-Leu-OCH3 and N-Ac-Dehydro-Phe-NorVal-OCH3

✍ Pushkar Sharma; Punit Narula; Tej P. Singh 📂 Article 📅 1994 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 470 KB

The dehydro-residue containing peptides N-Ac-dehydro-Phe-L-Leu-OCH3 ( I ) and N-Acdehydro-Phe-NorVal-OCH, (11) were synthesized by the usual workup procedures. The peptides crystallize from their solutions in methanol in space group P6,: ( I ) a = b = 12.528(2) A, c = 21.653(5) A; (11) a = b = 12.53