The synthesis of amino acids by reaction of an electrophilic glycine cation equivalent with neutral carbon nucleophiles
作者:Martin J. O'Donnell、William D. Bennett
DOI:10.1016/s0040-4020(01)86045-2
日期:1988.1
Seven neutral carbonnucleophiles (active aromatics, allylsilanes, and a silyl enol ether) were reacted with the glycine cation equivalent 12 in the presence of TiCl4to yield α-substituted amino acid derivatives in moderate yield (1 - 61.5 mmolar scale). Deprotection of the Schiff base ester products led to the corresponding amino acids.
Zur Darstellung von ?-Amino-?-ketocarbons�uren durch Kondensation von ?-Ketonmonobromiden mit Natriumacetaminomalonester
作者:O. Wiss、H. Fuchs
DOI:10.1002/hlca.19520350152
日期:1952.2.1
wird eine Methode beschrieben, die es erlaubt, α-Ketomonobromide in Gegenwart von Natrium mit Acetaminomalonester zu kondensieren. Die Methode hat sich gut bewährt zur Darstellungvon Phenacylacetaminomalonester, von Acetonylacetaminomalonester und, bei geringerer Ausbeute, von o-Nitrophenacylacetamino-malonester. Durch Verseifung und Decarboxylierung dieser Ester wurden die entsprechenden α-Amino-γ-ketocarbonsäuren
Use in the prevention and/or in the treatment of neurodegenerative diseases of 2-amino-4-phenyl-4-oxo-butyric acid derivatives which act as kynureninase enzyme inhibitors and/or kynurenine-3-hydroxylase enzyme inhibitors.
Several of these derivatives are new and, as such, constitute a further object of this invention, together with the process for their preparation and the pharmaceutical compositions containing them.