The present invention provides imidazotriazinone compounds which are inhibitors of phosphodiesterase 9. The present invention further provides processes, pharmaceutical compositions, pharmaceutical preparations and pharmaceutical use of the compounds in the treatment of PDE9 associated diseases or disorders in mammals, including CNS or neurodegeneration disorder.
Reactivity of bismuth(III) halides towards alcohols. A tentative to mechanistic investigation
作者:El Mehdi Keramane、Bernard Boyer、Jean-Pierre Roque
DOI:10.1016/s0040-4020(01)00013-8
日期:2001.3
bismuth(III) halides (BiX3; X=Cl, Br and I) towards a series of alcohols has been investigated. Three different reactions have been studied, namely: halogenation, dehydration and etherification. The behaviour of these bismuth derivatives was found to depend on the nature of the halide bonded to the bismuth atom. Their reactivities can be interpreted on the basis of the Hard and Soft Acids and Bases
研究了卤化铋(III)(BiX 3; X = Cl,Br和I)对一系列醇的反应性。已经研究了三种不同的反应,即:卤化,脱水和醚化。发现这些铋衍生物的行为取决于结合到铋原子上的卤化物的性质。它们的反应性可以根据硬酸和软酸和碱(HSAB)原理进行解释。提出了一种机制,该机制涉及形成醇与Bi(III)的复合物。
A Highly Chemoselective and Rapid Chlorination of Benzyl Alcohols under Neutral Conditions
作者:Chunbao Li、Lili Sun、Guisheng Peng、Hongmei Niu、Qiang Wang
DOI:10.1055/s-0028-1083243
日期:2008.12
A rapid and highly selective chlorination method has been developedusing 2,4,6-trichloro-1,3,5-triazine (TCT) catalyzed by dimethylsulfoxide. The reactions take 10 to 40 minutes, and the yields arealmost quantitative. The neutral reaction conditions are compatiblewith substrates bearing acid-labile functional groups. Both competitiveintramolecular and intermolecular reactions for benzyl alcoholsin
DMSO-catalyzed chlorination of alcohols using N-phenylbenzimidoyl chloride
作者:Qiang Wang、Jian Xu、Zhou-Qing Xu、Ji-Dan Yan
DOI:10.1007/s11164-012-0738-z
日期:2013.5
N-phenylbenzimidoyl chloride has been demonstrated as an efficient chlorination reagent catalyzed by dimethyl sulfoxide (DMSO) in conversion of alcohols to corresponding chlorides. The reaction conditions were mild, and most of the substrates gave satisfactory yields. The configurationinversion of the chlorination was proved using optically active phenyl alcohols. The amount of DMSO can be as low as
The present invention provides imidazotriazinone compounds which are inhibitors of phosphodiesterase 9 and pharmaceutically acceptable salt thereof. The present invention further provides processes, pharmaceutical compositions, pharmaceutical preparations and pharmaceutical use of the compounds in the treatment of PDE9 associated diseases or disorders in mammals, including humans.