Enantioselective fluorination of β-ketoamides in the presence of chiral palladium complexes
作者:Su Jin Kwon、Dae Young Kim
DOI:10.1016/j.jfluchem.2015.10.005
日期:2015.12
The catalytic enantioselective electrophilic fluorination of β-ketoamides promoted by chiral palladium complexes has been developed, allowing facile synthesis of the corresponding α-fluoro-β-ketoamides with excellent enantioselectivity (up to 97% ee).
The present invention relates to compounds that inhibit serine protease activity, particularly the activity of hepatitis C virus NS3-NS4A protease. As such, they act by interfering with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The invention further relates to compositions comprising these compounds either for ex vivo use or for administration to a patient suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a patient by administering a composition comprising a compound of this invention.
The present invention relates to compounds of formula I:
or a pharmaceutically acceptable salt or mixtures thereof that inhibit serine protease activity, particularly the activity of hepatitis C virus NS3-NS4A protease.
PHTHALAZINONES AND ISOQUINOLINONES AS ROCK INHIBITORS
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150353505A1
公开(公告)日:2015-12-10
The present invention provides compounds of Formula (I) or stereoisomers, tautomers, or pharmaceutically acceptable salts thereof, wherein all the variables are as defined herein. These compounds are selective ROCK inhibitors. This invention also relates to pharmaceutical compositions comprising these compounds and methods of treating cardiovascular, smooth muscle, oncologic, neuropathologic, autoimmune, fibrotic, and/or inflammatory disorders using the same.
Complexes of the type [Ti(1-Np-TADDOLato)(carbonylenolato)(2)] (3a-d), derived from beta-keto esters, have been prepared and structurally characterized by NMR and X-ray crystallography. In solution, two main diastereoisomeric forms were identified. In the major C-2-symmetric isomer, the face-on naphthyl group of the (S,S)-TADDOL shields the Si-side of the coordinated enolate. Therefore, electrophilic attack of the halogenating agent can only occur at the Re-side of the substrate. alpha-Acyl-gamma-lactams (4) were fluorinated with NFSI in the presence of the Ti(TADDOLato) catalyst in up to 87% ee. The absolute configuration of one of the products was determined by X-ray crystallography after derivatization. The observed absolute configuration at the fluorinated stereogenic center matches the one inferred from the structural analysis of the Ti(TADDOLato) complexes. (c) 2006 Elsevier Ltd. All rights reserved.