Iridium-Catalyzed C–H Activation and Deuteration of Primary Sulfonamides: An Experimental and Computational Study
摘要:
Iridium-catalyzed C-H activation and ortho-hydrogen isotope exchange is an important technology for allowing access to labelled organic substrates and aromatic drug molecules, and for the development of further C-H activation processes in organic synthesis. The use of [(COD)Ir(NHC)Cl] complexes (NHC = N-heterocyclic carbene) in the ortho-deuteration of primary sulfonamides under ambient conditions is reported. This methodology has been applied to the deuteration of a series of substrates, including the COX-2 inhibitors Celecoxib and Mavacoxib, demonstrating selective complexation of the primary sulfonamide over a competing pyrazole moiety. The observed chemoselectivity can be reversed by employing more encumbered catalyst derivatives of the type [(COD)Ir(NHC)(PPh3)]PF6. Computational studies have revealed that, although C-H activation is rate-determining, substrate complexation or subsequent C-H activation can be product-determining depending on the catalyst employed.
Derivatives of purine, their preparation process and pharmaceutical compositions containing them
申请人:Haesslein Jean-Luc
公开号:US20050187228A1
公开(公告)日:2005-08-25
A compound of the formula
wherein R is defined as in the specification, which compounds have an inhibitory effect vis-à-vis cycline-dependent kinase proteins (cdk) and are endowed with antimitotic properties.
MORPHOLINOTHIAZOLES AS ALPHA 7 POSITIVE ALLOSTERIC MODULATORS
申请人:Macdonald Gregor James
公开号:US20120238561A1
公开(公告)日:2012-09-20
The present invention relates to morpholinothiazole derivatives and pharmaceutically acceptable salts thereof, processes for preparing them, pharmaceutical compositions containing them and their use in therapy. The invention particularly relates to positive allosteric modulators of nicotinic acetylcholine receptors, such positive allosteric modulators having the capability to increase the efficacy of nicotinic receptor agonists.
New substituted heterocyclic compounds, compositions containing them, and methods of using them for the inhibition of Raf kinase activity are provided. The new compounds and compositions may be used either alone or in combination with at least one additional agent for the treatment of a Raf kinase mediated disorder, such as cancer.
[EN] OLIGONUCLEOTIDE COMPOSITIONS AND METHODS THEREOF<br/>[FR] COMPOSITIONS D'OLIGONUCLÉOTIDES ET PROCÉDÉS ASSOCIÉS
申请人:WAVE LIFE SCIENCES LTD
公开号:WO2019075357A1
公开(公告)日:2019-04-18
Among other things, the present disclosure provides technologies for altering splicing, particularly for increasing inclusion of exons in splicing products. In some embodiments, the present disclosure provides SMN2 oligonucleotides, compositions, and methods thereof. In some embodiments, the present disclosure provides chirally controlled SMN2 oligonucleotide compositions. In some embodiments, provided oligonucleotides and compositions can increase level of an exon 7-containing SMN2 splicing product and/or a gene product thereof. In some embodiments, the present disclosure provides methods for treatment of splicing-related conditions, disorders and diseases. In some embodiments, the present disclosure provides methods for treating SMN2-related conditions, disorders and diseases such as SMA (spinal muscular atrophy) and ALS (amyotrophic lateral sclerosis).
Pyrazole compounds as anti-inflammatory and analgesic agents
申请人:——
公开号:US20040019045A1
公开(公告)日:2004-01-29
This invention provides a compound of the formula (I):
1
wherein:
R
1
represents a hydrogen atom, an alkyl group, etc.; R
2
represents a hydrogen atom, a halogen atom, etc.; R
3
represents an alkyl group, etc.; R
4
represents an aryl group, etc.;
A represents an aryl
1
, etc; B represents an alkylene etc.; X represents NH, etc.;
or a pharmaceutically acceptable ester of such compound, and pharmaceutically acceptable salts thereof.
These compounds are useful for the treatment of medical conditions mediated by prostaglandin such as pain, fever or inflammation, etc. This invention also provides a pharmaceutical composition comprising the above compound.