Novel phenoxyalkylamine derivatives. II. Synthesis and Ca2+-antagonistic activities of .ALPHA.-alkyl-.ALPHA.-((phenoxypropylamino)propyl)-benzeneacetonitrile derivatives.
Precipiton Reagents: Precipiton Phosphines for Solution-Phase Reductions
摘要:
Several Precipiton phosphines were prepared and employed in the Staudinger reaction and in the reduction of secondary ozonides. Both amines and aldehdyes were obtained in good to excellent yields and purities. After use of the phosphine, isomerization and precipitation of the spent phosphorus reagent were induced by exposure to visible light in the presence of erythrosin B, a triplet sensitizer. Products were isolated by simple filtration. The use of the triplet sensitizer has the added advantage of eliminating [2 + 2] cycloaddition reactions between trans-Precipitons.
Novel and highly efficient bifunctional calixarene thiourea derivatives as organocatalysts for enantioselective Michael reaction of nitroolefins with diketones
作者:Hayriye Nevin Genc、Abdulkadir Sirit
DOI:10.1007/s10847-017-0761-1
日期:2018.2
New bifunctional calixarene thiourea organocatalysts were synthesized and applied in catalytic asymmetric Michael addition of acetylacetone to various nitroolefins at room temperature. The corresponding adducts were obtained in good to excellent yields with excellent enantioselectivities (up to 92% ee). The present research demonstrates the advantages of incorporating two stereocontrolling structures
Impact of Tetracationic Calix[4]arene Conformation—from Conic Structure to Expanded Bolaform—on Their Antibacterial and Antimycobacterial Activities
作者:Maxime Mourer、Raphaël E. Duval、Patricia Constant、Mamadou Daffé、Jean‐Bernard Regnouf‐de‐Vains
DOI:10.1002/cbic.201800609
日期:2019.4
The four possible conformers of a new tetrakisguanidino calix[4]arene thought to interact deleteriously with bacterial membranes have been synthesized, characterized, and evaluated for their in vitro cytotoxicity and antibacterial activity against various reference Gram-negative and Gram-positive bacteria, as well as Mycobacterium tuberculosis. It appears that reversal of at least one phenolic unit
based chiralorganocatalystsderivedfrom l-proline have been developed to catalyze directaldolreactions between cyclohexanone and aromatic aldehydes in water. Under the optimal conditions, high yields (up to 95%), enantioselectivities (up to 90%), and moderate diastereoselectivities (up to 65:35) were obtained. Considering the catalytic inefficiency of sole proline for the aldolreaction in water
UREA ANTAGONISTS OF P2Y1 RECEPTOR USEFUL IN THE TREATMENT OF THROMBOTIC CONDITIONS
申请人:Chao Hannguang J.
公开号:US20080280905A1
公开(公告)日:2008-11-13
The present invention provides novel pyridyl or phenyl ureas and analogues thereof, which are selective inhibitors of the human P2Y
1
receptor. The invention also provides for various pharmaceutical compositions of the same and methods for treating diseases responsive to modulation of P2Y
1
receptor activity.
Neue β-substituierte Aminophenethylazol-Derivate der Formel (I)
in welcher
X. Y, R', R2, i, m, p und q die in der Beschreibung angegebene Bedeutung haben,
ein Verfahren zur Herstellung der neuen Stoffe und deren Verwendung als Fungizide.
Neue Zwischenprodukte der Formel (IV)
in welcher
X, Y, R1, R2, I, m, p und q die in der Beschreibung angegebene Bedeutung haben,
und ein Verfahren zur Herstellung der neuen Zwischenprodukte.