The present application relates to novel bisaryl-linked 5-aryl-1,2,4-triazolone derivatives, to processes for preparing them, to their use alone or in combinations for the treatment and/or prevention of diseases and also to their use for the production of medicaments for the treatment and/or prevention of diseases, more particularly for the treatment and/or prevention of cardiovascular disorders.
Pd/C and NaBH4 in Basic Aqueous Alcohol: An Efficient System for an Environmentally Benign Oxidation of Alcohols
作者:Hakjune Rhee、Gwangil An、Hyunseok Ahn、Kathlia De Castro
DOI:10.1055/s-0029-1217115
日期:2010.2
We report the oxidation of a wide range of alcohols using an environmentally benign and economical process. The use of Pd/C heterogeneous catalysts along with NaBH4 in aqueous ethanol or methanol and either K2CO3 or KOH as base at room temperature under molecular oxygen or air give the corresponding oxidation products. This protocol is versatile since it is capable of oxidizing alcohols to its desired carbonyl or carboxyl counterpart. Room temperature reaction in aqueous system and recyclability of the catalyst are among the advantages of this manipulation. These advantages make the process safe and cheaper rendering it favorable from both economic and environmental viewpoints.
Synthesis and evaluation of potent, highly-selective, 3-aryl-piperazinone inhibitors of protein geranylgeranyltransferase-I
作者:Hairuo Peng、Dora Carrico、Van Thai、Michelle Blaskovich、Cynthia Bucher、Erin E. Pusateri、Said M. Sebti、Andrew D. Hamilton
DOI:10.1039/b517572k
日期:——
A series of compounds based on the carboxyl-terminal CAAL sequence of PGGTase-I substrates was designed and synthesized. Using piperazin-2-one as a semi-rigid scaffold, we have introduced critical pharmacophores in a well-defined arrangement to mimic the CAAL sequence. High potency and exceptional selectivity were obtained for inhibition of PGGTase-I with structures such as 45 and 70. Potency of this series of GGTIs was dependent on the presence of an L-leucine residue with a free carboxyl terminus, as well as an S configuration of the 3-aryl group. The selectivity was significantly enhanced by 5-methyl substitution on the imidazole ring and fluorine substitution on the 3-aryl group. Modification of the 6-position of the piperazinone scaffold was found to be unfavorable. Compounds 44 and 69, the corresponding methyl esters of 45 and 70, were found to selectively block processing of Rap1A by PGGTase-I in whole cells with IC50 values of 0.4 µM and 0.7 µM respectively.
Homo- and Heterodinuclear Ir and Rh Imine-functionalized Protic NHC Complexes: Synthetic, Structural Studies, and Tautomerization/Metallotropism Insights
作者:Fan He、Marcel Wesolek、Andreas A. Danopoulos、Pierre Braunstein
DOI:10.1002/chem.201504030
日期:2016.2.18
3 a+[PF6]− afforded the eighteen‐valence‐electron complexes [Ir(cod)(PR3)C3H3N2(DippN=CMe)‐κ2(C2,Nimine)}]+[PF6]− (7 a+[PF6]− (R=Ph) and 7 b+[PF6]− (R=Me)). In contrast to Ir, chloride abstraction from [Rh(cod)ClC3H3N2(DippN=CMe)‐κN3}] (1 b) at room temperature afforded [Rh(cod)C3H3N2(DippN=CMe)‐κN3}2]+[PF6]− (6 b+[PF6]−) and [Rh(cod)C3H3N2(DippN=CMe)‐κ2(C2,Nimine)}]+[PF6]− (3 b+[PF6]−) (minor);
New substituted 1H-imidazoles and their salts, processes for the preparation thereof and pharmaceutical compositions. These compounds have the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.5 =hydrogen or C.sub.1 -C.sub.4 -alkyl; R.sub.4 =hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy; Y.sub.1 =hydrogen and Y.sub.2 =OZ.sub.2 or the reverse; Z.sub.1 =Z.sub.2 =hydrogen or C.sub.1 -C.sub.4 -alkyl or Z.sub.1 and Z.sub.2 =--CH.sub.2 -- or --C(CH.sub.3).sub.2 --. These compounds are prepared either by reducing a corresponding imidazole compound having a hydroxyl or alkoxy group on the methyl bridge between the imidazole and phenyl rings, or by hydrolyzing a 4-[[2,2-dimethyl-4H-1,3-benzodioxin-6(or 8)-yl]methyl]-1H-imidazole, or yet by reducing an alkyl 3-[(1H-imidazol-4-yl)methyl]-2-hydroxybenzoate. These compounds have cardiac, cerebral and tissular anti-ischemic activities.