Catalytic Hydrogenation of Chiral α-Amino and α-Hydroxy Esters at Room Temperature with Nishimura Catalyst without Racemization
摘要:
The hydrogenation or carboxylic acid derivatives at room temperature was investigated. With a mixed Rh/Pt oxide (Nishimura catalyst), low to medium activity was observed for various alpha-amino and alpha-hydroxy esters. At 100 bar hydrogen pressure and 10% catalysts loading, high yields or tire desired amino alcohols and diols were obtained without racemization. The most suitable alpha-substituents were NH2, NHR, and 011, whereas beta-NH2 were less effective. Usually, aromatic rings were also hydrogenated, but with the free bases of amino acids as substrates, some selectivity was observed. No reaction was round for alpha-NR2, alpha-OR, and unfunctionalized esters; acids and amides, were also not reduced under these conditions. A working hypothesis for the mode or action of the catalyst is presented.
[EN] DIPEPTIDE AND TRIPEPTIDE EPOXY KETONE PROTEASE INHIBITORS<br/>[FR] INHIBITEURS DE DIPEPTIDE ET DE TRIPEPTIDE ÉPOXY CÉTONE PROTÉASES
申请人:ONYX THERAPEUTICS INC
公开号:WO2014152127A1
公开(公告)日:2014-09-25
Provided herein are dipeptide and tripeptide epoxy ketone protease inhibitors, methods of their preparation, related pharmaceutical compositions, and methods of using the same. For example, provided herein are compounds of Formula (X): and pharmaceutically acceptable salts and compositions including the same. The compounds and compositions provided herein may be used, for example, in the treatment of proliferative diseases including cancer and autoimmune diseases.
[EN] GAMMA AMINO ACID BUILDING BLOCKS<br/>[FR] ÉLÉMENTS CONSTITUTIFS DE GAMMA-AMINOACIDES
申请人:WISCONSIN ALUMNI RES FOUND
公开号:WO2011047190A1
公开(公告)日:2011-04-21
The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a pro line derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.). The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ- amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.
Compounds with Matrix-Metalloproteinase Inhibitory Activity and Imaging Agents Thereof
申请人:Kolb Hartmuth C.
公开号:US20120282180A1
公开(公告)日:2012-11-08
The present invention relates to the field of therapeutic and diagnostic agents and more specifically to compounds of formula (I) that are inhibitors of matrix-metalloproteinases (MMPs) and are useful in the treatment of diseases related thereto such as cardiovascular diseases, inflammatory diseases and malignant diseases. One embodiment of the invention is a compound of formula (I) labeled with a 18-fluorine atom having matrix metalloproteinase inhibitory activity suitable for diagnostic imaging. Also disclosed in the present invention is a pharmaceutical composition comprising the inhibitors of matrix-metalloproteinases (MMPs) of the invention or the corresponding labeled compounds useful as diagnostic imaging agents of the invention in a form suitable for mammalian administration. The invention furthermore discloses intermediates in the synthesis of the inhibitors of matrix-metalloproteinases (MMPs) of the invention and of the diagnostic imaging agents of the invention and kits for the preparation of the pharmaceutical composition of the invention.
DIPEPTIDE AND TRIPEPTIDE EPOXY KETONE PROTEASE INHIBITORS
申请人:ONYX THERAPEUTICS, INC.
公开号:US20160031934A1
公开(公告)日:2016-02-04
Provided herein are dipeptide and tripeptide epoxy ketone protease inhibitors, methods of their preparation, related pharmaceutical compositions, and methods of using the same. For example, provided herein are compounds of Formula (X): and pharmaceutically acceptable salts and compositions including the same. The compounds and compositions provided herein may be used, for example, in the treatment of proliferative diseases including cancer and autoimmune diseases.
Compounds of Formula I and pharmaceutically acceptable salts and co-crystals thereof are useful for the inhibition of HIV reverse transcriptase. The compounds may also be useful for the prophylaxis or treatment of infection by HIV and in the prophylaxis, delay in the onset or progression, and treatment of AIDS. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antiviral agents, immunomodulators, antibiotics or vaccines.
式 I 的化合物及其药学上可接受的盐类和共晶体可用于抑制 HIV 逆转录酶。这些化合物还可用于预防或治疗艾滋病病毒感染,以及预防、延缓艾滋病的发生、发展和治疗。这些化合物及其盐类可用作药物组合物的成分,也可与其他抗病毒剂、免疫调节剂、抗生素或疫苗结合使用。