Systematic methodology for the development of biocatalytic hydrogen-borrowing cascades: application to the synthesis of chiral α-substituted carboxylic acids from α-substituted α,β-unsaturated aldehydes
作者:Tanja Knaus、Francesco G. Mutti、Luke D. Humphreys、Nicholas J. Turner、Nigel S. Scrutton
DOI:10.1039/c4ob02282c
日期:——
catalyze the asymmetric reduction of activated carbon–carbon double bonds. In particular, α,β-unsaturated carbonyl compounds (e.g. enals and enones) as well as nitroalkenes are rapidly reduced. Conversely, α,β-unsaturatedesters are poorly accepted substrates whereas free carboxylic acids are not converted at all. The only exceptions are α,β-unsaturated diacids, diesters as well as esters bearing an
Does the DABCO-catalysed reaction of 2-hydroxybenzaldehydes with methyl acrylate follow a Baylis–Hillman pathway?
作者:Perry T. Kaye、Musiliyu A. Musa、Xolani W. Nocanda、Ross S. Robinson
DOI:10.1039/b300360d
日期:2003.3.27
Evidence is presented which supports the intermediacy of dipolar Baylis-Hillman-type adducts in the synthesis of coumarin and chromene derivatives from the reaction of 2-hydroxybenzaldehydes with methyl acrylate in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO).
Highly diastereoselective 1,3-dipolar cycloaddition of nonstabilized azomethine ylides to 3-nitro-2-trihalomethyl-2H-chromenes: synthesis of 1-benzopyrano[3,4-c]pyrrolidines
作者:Vladislav Yu. Korotaev、Alexey Yu. Barkov、Vladimir S. Moshkin、Evgeniya G. Matochkina、Mikhail I. Kodess、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tet.2013.07.080
日期:2013.10
Reactions of 3-nitro-2-trifluoro(trichloro)methyl-2H-chromenes, including 2-unsubstituted derivatives, with N-alkyl-α-amino acids (sarcosine, proline) and paraformaldehyde proceed diastereoselectively to give 1-benzopyrano[3,4-c]pyrrolidines in good yields as a result of a 1,3-dipolarcycloaddition of the intermediate nonstabilized azomethineylide at the Δ3-bond of the chromene system.
Mitogen activated protein kinase-activated protein kinase-2 inhibiting compounds
申请人:Pharmacia Corporation
公开号:US20040209897A1
公开(公告)日:2004-10-21
Compounds are described which inhibit mitogen activated protein kinase-activated protein kinase-2 (MK-2). Methods of using such compounds for the inhibition of MK-2, and for the prevention or treatment of a disease or disorder that is mediated by TNF&agr;, are described, where the method involves administering to the subject an MK-2 inhibiting compound of the present invention. Therapeutic compositions, pharmaceutical compositions and kits which contain the present MK-2 inhibiting compounds are also described.
Inhibitors of serine proteases, particularly HCV NS3-NS4A protease
申请人:Farmer J. Luc
公开号:US20080045480A1
公开(公告)日:2008-02-21
The present invention relates to peptidomimetic 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.