Design and Fast Synthesis of C-Terminal Duplicated Potent C2-Symmetric P1/P1‘-Modified HIV-1 Protease Inhibitors
摘要:
tin analysis of the X-ray structure of a complex of HIV-1 protease with a linear C-2-symmetric C-terminal duplicated inhibitor guided the selection of a series of diverse target compounds. These were synthesized with the objective to identify suitable P1/P1' substituents to provide inhibitors with improved antiviral activity. Groups with various physical properties were attached to the para-positions of the P1/P1' benzyloxy groups in the parent inhibitor. A p-bromobenzyloxy compound, prepared in only three steps from commercially available starting materials, was utilized as a common precursor in all reactions. The subsequent coupling reactions were completed within a few minutes and relied on palladium catalysis and flash heating with microwave irradiation. All of the compounds synthesized exhibited good inhibitory potency in the protease assay, with K-i values ranging from 0.09 to 3.8 nM. A 30-fold improvement of the antiviral effect in cell culture, compared to the parent compound, was achieved with four of the inhibitors. The differences in K-i values were not correlated to the differences in antiviral effect, efficiency against mutant virus, or reduced potency in the presence of human serum. The poorest enzyme inhibitors in fact belong to the group with the best antiviral effect. The binding features of two structurally related inhibitors, cocrystallized with HIV-1 protease, are discussed with special emphasis on the interaction at the enzyme/water phase.
CYTOTOXIC PEPTIDES AND ANTIBODY DRUG CONJUGATES THEREOF
申请人:PFIZER INC.
公开号:US20130129753A1
公开(公告)日:2013-05-23
The present invention is directed to cytotoxic pentapeptides, to antibody drug conjugates thereof, and to methods for using the same to treat cancer.
本发明涉及细胞毒性五肽,其抗体药物偶联物,以及使用它们治疗癌症的方法。
Pd-Catalysed oxidative carbonylation of α-amino amides to hydantoins under mild conditions
作者:Aleksandr Voronov、Vinayak Botla、Luca Montanari、Carla Carfagna、Raffaella Mancuso、Bartolo Gabriele、Giovanni Maestri、Elena Motti、Nicola Della Ca
DOI:10.1039/d1cc04154a
日期:——
The first example of palladium-catalysed oxidative carbonylation of unprotected α-amino amides to hydantoins is described here. The selective synthesis of the target compounds was achieved undermildconditions (1 atm of CO), without ligands and bases. The catalytic system overrode the common reaction pathway that usually leads instead to the formation of symmetrical ureas.
HEPATITIS C VIRUS INHIBITORS AND USES THEREOF IN PREPARATION OF DRUGS
申请人:CHANGZHOU YINSHENG PHARMACEUTICAL CO., LTD.
公开号:US20170253614A1
公开(公告)日:2017-09-07
A series of hepatitis C virus (HCV) inhibitors and compositions and applications thereof in the preparation of drugs for treating chronic HCV infection. Especially, a series of compounds that are used as NS5A inhibitors, and compositions and uses thereof in the preparations of drugs.
作者:Daniel J. Leonard、John W. Ward、Jonathan Clayden
DOI:10.1038/s41586-018-0553-9
日期:2018.10
α-aryl amino acids and their derivatives are valuable precursors to bioactive molecules10,11. Here we describe the synthesis of quaternary α-aryl amino acids from enantiopure amino acid precursors by α-arylation without loss of stereochemical integrity. Our approach relies on the temporary formation of a second stereogenic centre in an N′-arylurea adduct12 of an imidazolidinone derivative6 of the precursor
[EN] COMPOSITION FOR THE TREATMENT OF IGF-1R EXPRESSING CANCER<br/>[FR] COMPOSITION POUR LE TRAITEMENT D'UN CANCER EXPRIMANT IGF-1R
申请人:PF MEDICAMENT
公开号:WO2017072196A1
公开(公告)日:2017-05-04
The present invention relates to a method for the treatment of IGF-IR expressing cancers as well as to a compositions and a kit for said traitment. From one aspect, the invention reates to the combined use of a first antibody for the determination of the IGF-IR status of a cancer and a second antibody used as an ADC for the treatment of said cancer.