Atropisomerization Barriers of Configurationally Unstable Biaryl Compounds, Useful Substrates for Atroposelective Conversions to Axially Chiral Biaryls
摘要:
Configurationally unstable biaryl lactones of type (M)-1 reversible arrow (P)-1 and ring-opened 2-acyl-2'-hydroxy biaryl compounds of type (M)-4 reversible arrow (P)-4 are versatile precursors for the atroposelective preparation of axially chiral biaryls. The activation barriers of their atropisomerization process, which constitutes a fundamental precondition for the dynamic kinetic resolution, were determined by dynamic NMR spectroscopy for rapid processes and by HPLC-monitored racemization of enantiomerically enriched material for smaller interconversion rates. For the lactones, the free activation energies Delta G(298)(double dagger) increase with the steric demand of the substituent R ortho to the biaryl axis in the series H < OMe (t(1/2) approximate to ms) < Me (t(1/2) approximate to s) < Et < i-Pr (t(1/2) approximate to min) < t-Bu (t(1/2) approximate to d). The formally ring-opened 2-acyl-2'-hydroxy biaryls, which interconvert via the lactol isomers 5 as the cyclic (and thus configurationally less stable) intermediates, have a significantly slower atropisomerization rate as a result of the high loss in activation entropy Delta S-double dagger as a consequence of the required intermediate ring closure 4 --> 5.
The present disclosure provides phenolic compounds useful in the treatment of neurological conditions such as convulsions and tremors, having the structure of Formula (I):
wherein R
2
, R
4
, & R
5
, are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating neurological conditions.
Raf inhibitor compounds and methods of use thereof
申请人:Miknis Greg
公开号:US20070049603A1
公开(公告)日:2007-03-01
Compounds of Formula I are useful for inhibiting Raf kinase and for treating disorders mediated thereby. Methods of using compounds of Formula I, and stereoisomers, geometric isomers, tautomers, solvates and pharmaceutically acceptable salts thereof, for in vitro, in situ, and in vivo diagnosis, prevention or treatment of such disorders in mammalian cells, or associated pathological conditions are disclosed.
[EN] NOVEL IMMUNOMODULATOR AND ANTI INFLAMMATORY COMPOUNDS<br/>[FR] NOUVEAUX COMPOSÉS IMMUNOMODULATEURS ET ANTI-INFLAMMATOIRES
申请人:INCOZEN THERAPEUTICS PVT LTD
公开号:WO2011138665A1
公开(公告)日:2011-11-10
The present invention provides dihydroorotate dehydrogenase inhibitors of formula (I), methods of preparing them, pharmaceutical compositions containing them and methods of treatment, prevention and/or amelioration of diseases or disorders wherein the inhibition of Dihydroorotate dehydrogenase is known to show beneficial effect.
Compounds that modulate PPAR activity and methods of preparation
申请人:——
公开号:US20030207924A1
公开(公告)日:2003-11-06
This invention discloses compounds that alter PPAR activity. The invention also discloses pharmaceutically acceptable salts of the compounds, pharmaceutically acceptable compositions comprising the compounds or their salts, and methods of using them as therapeutic agents for treating or preventing hyperlipidemia and hypercholesteremia in a mammal. The present invention also discloses methods for making the disclosed compounds.
The present invention provides novel compounds that are antagonists of PI3 kinase, PI3 kinase and tryosine kinase, PI3Kinase and mTOR, or PI3Kinase, mTOR and tryosine kinase.