摘要:
The radiolabeled non-natural amino acid 1-amino-3- cyclobutane-1-carboxylic acid (ACBC) and its analogs are candidate tumor imaging agents useful for positron emission tomography and single photon emission computed tomography due to their selective affinity for tumor cells. The present invention provides methods for stereo-selective synthesis of syn-ACBC analogs. The disclosed synthetic strategy is reliable and efficient and can be used to synthesize a gram quantity of various syn-isomers of the ACBC analogs, particularly, syn- [18F]-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC) and syn- [123I]-1-amino-3-iodocyclobutane-1-carboxylic (IACBC) acid analogs.
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:
The present invention provides process useful for the preparation of intermediates which are useful in the preparation of amino acids useful in preparing peptide receptor modulators, for example agonists or partial agonists of such peptide receptors. Such peptide receptor modulators include, for example glucagon like peptide-1 receptor modulators which are useful for the amelioration of the diabetic condition.
摘要:
The present invention relates to a sequence for the preparation of amino acids, for example alpha amino acids, in particular methionine, by making use of an amidocarbonylation reaction in the presence of a cobalt carbonyl catalyst and separating the catalyst in the form of a Co(N-amino acid) 2 compound.
摘要:
A process for efficiently producing a hydroxyamino acid derivative, especially an optically active isomer thereof. The process, which is for producing a hydroxyamino acid derivative represented by the formula (I): (I) or a salt thereof, is characterized by subjecting in a solvent an amino acid derivative represented by the formula (II): (II) to a reaction for selectively reducing the pendant terminal carboxyl group and then optionally subjecting the reaction product to a reaction for eliminating the amino−protecting group or a reaction for forming a salt of the amino or carboxyl group.
摘要:
The present invention is directed to a method for the preparation of a chiral beta -amino ester of formula (I) or (II), wherein R is lower alkyl; and X and Y are the same or different halogens selected from the group consisting of CI, Br or I.
摘要:
Compounds of Formula (I), including stereoisomers and salts thereof, and compositions, methods of treatment and prevention, and methods of preparing, the same: Formula (I) wherein X is O or a direct bond; wherein when X is O, R 1 and R 2 are each independently selected from -H, -SO 3 Na, -PO(ONa) 2 , -PO(OCH 2 CH 3 ), -CH 2 PO(ONa) 2 , -NO 2 , -(L)-valine ester, -(L)-N-methyl arginine ester, -α-guanidinoglutaric acid ester, -2-iminobiotin ester, -3- hydroxy anthranilic acid ester, -(L)-nitroarginine ester, -(L)- N5-(1-iminoethyl)-(L)- ornithine (NIO) ester, -(L)-N,N dimethylarginine ester, -(L)- N6-(1-iminoethyl)-(L)-lysine (NIL) ester, -(L)- N-monomethyl-(L)-arginine (NMMA) ester, -N-amino-(L)-arginine ester, -N-propyl-(L)-arginine ester, -S-methyl-(L)-thiocitrulline ester, -methyl-(L)-NIO ester, - vinyl -(L)-NIO ester, and -propenyl-(L)-NK) ester; and wherein when X is a direct bond, R 1 and R 2 are Formula (II).
摘要:
The present application relates to processes for the preparation of the aspergillomarasmine A (AM-A) compound and analogs and derivatives thereof. The features of this process involves the use of a cyclic activated serine synthon in the construction of the poly-amino acid backbone. Also included are certain novel analogs of AM-A along with compositions comprising these compounds and uses thereof.
摘要:
The invention relates to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, in particular neutral endopeptidase (NEP) inhibitors such as sacubitril, and prodrugs thereof.
摘要:
The present invention relates to a process to prepare N,N'-di(2-hydroxybenzyl) ethylenediamine-N,N'-diacetic acid and salts thereof comprising a reaction between formaldehyde, ethylenediamine diacetic acid or a salt thereof and phenol at a pH of between 3 and 7 and a temperature below 60°Cwherein the reaction mixture contains 0.2 to 1.1 molar equivalents of alkali metalions on the molar amount of EDDA.