摘要:
The present invention relates to a novel composition comprising 1-amino-3-[ 18 F]-fluorocyclobutanecarboxylic acid ([ 18 F]-FACBC) wherein said composition has certain superior properties in comparison with known compositions comprising [ 18 F]-FACBC. Also provided by the invention is a method to obtain said composition.
摘要:
The invention relates to a novel method for preparing (poly)aminoalkylaminoacetamide derivatives of epipodophyllotoxin and the salts thereof. The invention is characterised in that it includes a step comprising the peptide coupling of 4 amino 4' demethylepipodophyllotoxin to an amine reactant containing protective groups.
摘要:
Materials and methods for preparing (S)-(+)-3-aminomethyl-5-methyl-hexanoic acid and structurally related compounds via enzymatic kinetic resolution are disclosed.
摘要:
A process for production of optically active N-acetyl -beta-phenylalanine through optical resolution of N-acetyl-beta- phenylalanine by preferential crystallization. According to this process, not only optically active N-acetyl-beta-phenyl- alanine but also optically active beta-phenylalanine can be produced easily and efficiently.
摘要:
The invention provides a process for the preparation of racemic amino acids, characterized in that an acylamino acid of the general formula R -CH(NH-CO-R )COOH wherein R is hydrogen, a linear, branched or cyclic alkyl radical that has from 1 to 7 carbon atoms and that may contain substituents such as a hydroxyl, alkyloxy or alkylthio group; and R is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms; is heated in the presence of water, in a pressure-resistant vessel, to a temperature in the range from 110 DEG C to 220 DEG C and is hydrolyzed.
摘要:
The present invention relates to: a method for easily preparing (2RS)-amino-(3S)-hydroxy-butyric acid, which is a chiral amino acid, in a high yield and a high purity using a chemical synthesis and an enzymatic reduction reaction; an intermediate therefor; and a method for preparing the intermediate.
摘要:
Provided are methods for the synthesis of compounds including chiral kynurenine compounds, intermediates useful for the synthesis thereof, and related compounds. For example, methods are provided for the synthesis of L-4-chlorokynurenine.
摘要:
The present invention provides a method for the production of [ 18 F]-FACBC which has advantages over know such methods. Also provided by the present invention is a system to carry out the method of the invention and a cassette suitable for carrying out the method of the invention on an automated radiosynthesis apparatus.
摘要:
The present invention relates to a novel manufacturing process of pharmaceutically active compound of formula (I) used as oral anti-diabetic drug. Starting from -aspartic acid derivate of formula (IV) the invention describes preparation of the chiral (R)-β-amino acid of formula (II) known as a precursor in the synthesis of Sitagliptin (Formula I). Formulae (I), (II) & (IV):