A Convenient Method to Obtain 4,5-Dihydro-<i>1H</i>-Methylpyrazoles by A Ring Transformation Reaction
作者:Helio Gauze Bonacorso、Arci Dirceu Wastowski、Nilo Zanatta、Marcos Antonio Pinto Martins
DOI:10.1080/00397910008087174
日期:2000.4
Abstract A convenientmethod for the synthesis of alkyl[aryl]-substituted 5-hydroxy-5-trifluoromethyl-4,5-dihydro-1H-1-methylpyrazole (2) from a new ring transformation reaction of alkyl[aryl]-substituted-5-hydroxy-5-trifluoromethyl-4,5-dihydro-1H-1-pyrazolethiocarboxyamide (1) with methylhydrazine in THF, and the thermal dehydration of 2, are reported.
Triplet Energy Transfer Mechanism in Copper Photocatalytic <i>N</i>‐ and <i>O</i>‐Methylation
作者:Martijn Hoving、Jacob‐Jan Haaksma、Anne Stoppel、Lukas Chronc、Jonas Hoffmann、Sebastian B. Beil
DOI:10.1002/chem.202400560
日期:2024.4.16
We investigated the photochemical energy transfer mechanism of hypervalent iodine reagents. When coupled to copper catalysis we achieved successful methylation of a diverse set of N-heterocycles and (hetero−)aromatic carboxylic acids. In addition, we could show application of this methodology to more complex active pharmaceuticalintermediates. Mechanistic investigations support our observations and
[EN] C3A ANTAGONISTS AND PHARMACEUTICAL COMPOSITIONS THEREOF<br/>[FR] ANTAGONISTES DE C3A ET LEURS COMPOSITIONS PHARMACEUTIQUES
申请人:PFIZER PROD INC
公开号:WO2007034279A2
公开(公告)日:2007-03-29
[EN] Aryl substituted pyrazole compounds according to the formula (I) or pharmaceutically acceptable salts thereof, are provided. These compounds are useful in pharmaceutical compositions as C3a antagonists for treating a variety of medical conditions associated with the Complement cascade. Methods for treating such conditions are also provided. [FR] L'invention concerne des composés de pyrazole substitués par un aryle représentés par la formule (I) ou des sels de ceux-ci pharmaceutiquement acceptables. On utilise ces composés dans des compositions pharmaceutiques, telles que des antagonistes de C3a, pour traiter une variété d'états pathologiques associés à la cascade du complément. L'invention concerne également des méthodes permettant de traiter ces états pathologiques.
[EN] NOVEL C3A RECEPTOR ANTAGONISTS<br/>[FR] NOUVEAUX ANTAGONISTES DU RECEPTEUR DU C3A
申请人:PFIZER PROD INC
公开号:WO2007034278A2
公开(公告)日:2007-03-29
[EN] Aryl substituted imidazo[4,5-c] pyridine compounds are provided. These compounds are useful in pharmaceutical compositions as C3a antagonists for treating a variety of medical conditions associated with the Complement cascade. Methods for treating such conditions are also provided. [FR] L'invention porte sur des composés aryles substitués imidazo[4,5-c] pyridine. Ces composés sont utiles dans des compositions pharmaceutiques comme antagonistes du C3a pour traiter différents états médicaux associés à la cascade du complément. L'invention porte également sur des méthodes de traitement desdits états.