Novel Spiroketal Pyrrolidine GSK2336805 Potently Inhibits Key Hepatitis C Virus Genotype 1b Mutants: From Lead to Clinical Compound
摘要:
[GRAPHICS]Rapid clinical progress of hepatitis C virus (HCV) replication inhibitors, including these selecting for resistance in the NS5A region (NS5A inhibitors), promises to revolutionize HCV treatment. Herein, we describe our explorations of diverse spiropyrrolidine motifs in novel NS5A inhibitors and a proposed interaction model. We discovered that the 1,4-dioxa-7-azaspiro[4.4]nonane motif in inhibitor 41H (GSIC2236805) supported high potency against genotypes la and lb as well as in genotype 1b L31V and Y93H mutants. Consistent with this, 41H potently suppressed HCV RNA in the 20-day RNA reduction assay. Pharmacokinetic and safety data supported further progression of 41H to the clinic.
Concurrent esterification and N-acetylation of amino acids with orthoesters: a useful reaction with interesting mechanistic implications
摘要:
The concurrent esterification and N-acetylation of amino acids has been studied with triethyl orthoacetate (TEOA) and triethyl orthoformate (TEOF). In a surprising finding, only 1 equiv of TEOA in refluxing toluene was necessary to convert L-proline and L-phenylalanine into the corresponding N-acetyl ethyl esters in good yield. The same transformation using TEOF was not effective. Stereochemical outcome and stoichiometric studies as well as structural variation of the amino acids in this reaction provided unexpected mechanistic insight. (C) 2010 Elsevier Ltd. All rights reserved.
4-[(.alpha.,.alpha.-Diaryl)-hydroxymethyl]-1-piperidinylalkylcyclic carbamate derivatives having the formula: ##STR1## wherein; R is hydrogen, loweralkyl, cycloalkyl, phenyl and substituted phenyl; Ar and Ar.sup.1 are phenyl, substituted phenyl or pyridinyl; alk is a straight or branched hydrocarbon chain; R.sup.1 is loweralkyl substituted for hydrogen on a ring carbon. The compounds are useful antihistamines and in controlling allergic response.
Described are RORγ modulators of the formula (I),
or stereoisomers, tautomers, pharmaceutically acceptable salts, solvates, or prodrugs thereof, wherein all substituents are defined herein. Also provided are pharmaceutical compositions comprising the same. Such compounds and compositions are useful in methods for modulating RORγ activity in a cell and methods for treating a subject suffering from a disease or disorder in which the subject would therapeutically benefit from modulation of RORγ activity, for example, autoimmune and/or inflammatory disorders.
This invention is directed generally to a process for making substituted pyrazoles, tautomers of the substituted pyrazoles, and salts of the substituted pyrazoles and tautomers. The substituted pyrazoles correspond in structure to Formula (I):
1
wherein R
3A
, R
3B
, R
3C
, Y
1
, Y
2
, Y
3
, Y
4
, and Y
5
are as defined in the specification.
[EN] DIHYDROPYRAZOLOPYRIDINE COMPOUNDS<br/>[FR] COMPOSES DE DIHYDROPYRAZOLOPYRIDINE
申请人:MITSUBISHI PHARMA CORP
公开号:WO2004014910A1
公开(公告)日:2004-02-19
The present invention provides dihydropyrazolopyridine compounds represented by the formula (I):wherein each symbol is as defined in the specification, optically active forms thereof, and pharmaceutically acceptable salts thereof and hydrates thereof. The compounds of the present invention show a selective and strong inhibitory activity on glycogen synthase kinase-3 beta (GSK-3β), and are useful as medicaments for prevention and/or treatment of diabetes, diabetic complications and neurodegenerative diseases or as immunopotentiators.
organometallic reagents has attracted the attention of organic chemists for a long time. However limited methods are reliable for common amides and have found synthetic applications. Here we report a method featuring in situ activation of tertiary amides with triflic anhydride (Tf2O) followed by addition of Grignardreagents. The method displays a good generality in scope for both amides and Grignard reagents