25488-25-9Relevant articles and documents
Stereoselective synthesis of β-alkylated α-amino acids via palladium-catalyzed alkylation of unactivated methylene C(sp3)-H Bonds with Primary Alkyl Halides
Zhang, Shu-Yu,Li, Qiong,He, Gang,Nack, William A.,Chen, Gong
supporting information, p. 12135 - 12141 (2013/09/02)
We report a new set of reactions based on the Pd-catalyzed alkylation of methylene C(sp3)-H bonds of aliphatic quinolyl carboxamides with α-haloacetate and methyl iodide and applications in the stereoselective synthesis of various β-alkylated α-amino acids. These reactions represent the first generally applicable method for the catalytic alkylation of unconstrained and unactivated methylene C-H bonds with high synthetic relevance. When applied with simple isotope-enriched reagents, they also provide a convenient and powerful means to site-selectively incorporate isotopes into the carbon scaffolds of amino acid compounds.
A Versatile Chemo-Enzymatic Route to Enantiomerically Pure β-Branched α-Amino Acids
Roff, Geoffrey J.,Lloyd, Richard C.,Turner, Nicholas J.
, p. 4098 - 4099 (2007/10/03)
A series of diastereoisomers of β-methyl-β-phenylalanine analogues 1a?f have been prepared in enantiomerically pure form using a combination of chemo- and biocatalysis. Starting from l-threonine methyl ester 2, a range of β,β-disubstituted didehydroamino
Catalytic asymmetric hydrogenation of α-(acetamido)acrylates using TRAP trans-chelating chiral bisphosphine ligands: Remarkable effects of ligand P-substituent and hydrogen pressure on enantioselectivity
Kuwano,Sawamura,Ito
, p. 2571 - 2578 (2007/10/03)
The catalytic asymmetric hydrogenation of α-(acetamido)acrylates was carded out with the rhodium complexes prepared from [Rh(cod)2]BF4 and trans-chelating chiral bisphosphine ligands, (S,S)-2,2'-bis[(R)-1-(dialkylphosphino)ethyl]-1,1