Chlorophosphines as auxiliary ligands in ruthenium-catalyzed nitrile hydration reactions: application to the preparation of β-ketoamides
作者:Rebeca González-Fernández、Pedro J. González-Liste、Javier Borge、Pascale Crochet、Victorio Cadierno
DOI:10.1039/c5cy02142a
日期:——
heteroaryl or alkyl group). In the reaction medium, the coordinated chlorophosphines readily undergo hydrolysis to generate the corresponding phosphinous acids PR2OH, which are well-known “cooperative” ligands for this catalytic transformation. Among the complexes employed, best results were obtained with [RuCl2(η6-p-cymene)P(4-C6H4F)2Cl}]. Performing the catalytic reactions at 40 °C with 2 mol% of this
Pyrido[2,3-D]pyrimidine derivatives and pharmaceutical compositions
申请人:Yamanouchi Pharmaceutical Co., Ltd.
公开号:US06136810A1
公开(公告)日:2000-10-24
This invention relates to compounds (I) or pharmaceutically acceptable salts thereof, having a function to inhibit type IV phosphodiesterase (PDE) ##STR1## [X: an oxygen atom or a sulfur atom, R.sup.1 : a lower alkyl group, a cycloalkyl-lower alkyl group or a cycloalkyl group, R.sup.2 : a hydrogen atom, a halogen atom, a lower alkyl group, a halogeno-lower alkyl group, a hydroxy-lower alkyl group, a mercapto-lower alkyl group, a lower alkoxy-lower alkyl group, a lower alkylthio-lower alkyl group, a lower alkanoyloxy-lower alkyl group, a lower alkanoylthio-lower alkyl group, a lower alkanoyl-lower alkyl group, a hydroxyimino-lower alkyl group, a lower alkoxyimino-lower alkyl group, a cycloalkyl group, an aryl group or a lower alkanoyl group, R.sup.3 : a hydrogen atom, a halogen atom or a lower alkyl group, R.sup.4 : a hydrogen atom or a lower alkyl group, R.sup.5 : a cycloalkyl group; a naphthyl group substituted; a five- or six-membered monocyclic hetero ring group having 1 to 4 hetero atoms selected from nitrogen atom, oxygen atom and sulfur atom; or a group represented by the formula ##STR2## amd F.sup.6 : a halogen atom, a lower alkyl group, a halogeno-lower alkyl group, a hydroxyl group, a lower alkoxy group, a cyano group or a nitro group].
Preparation of N-unsubstituted β-ketoamides by Rhodococcus rhodochrous-catalysed hydration of β-ketonitriles
作者:Vicente Gotor、Ramón Liz、Ana Mª Testera
DOI:10.1016/j.tet.2003.10.096
日期:2004.1
N-unsubstituted β-ketoamides, hardly obtainable or non-accessible by non-enzymatic methods, have been synthesized, with good to excellent yields, by the generally fast hydration of the corresponding β-ketonitriles, catalysed by the bacterium Rhodococcus rhodochrous IFO 15564. This bacterium shows nitrile hydratase and amidase activities, the latter being inhibited during its growth phase with diethyl phosphoramidate
<i>De Novo</i> Parallel Design, Synthesis and Evaluation of Inhibitors against the Reverse Transcriptase of Human Immunodeficiency Virus Type-1 and Drug-Resistant Variants
作者:Alon Herschhorn、Lena Lerman、Michal Weitman、Iris Oz Gleenberg、Abraham Nudelman、Amnon Hizi
DOI:10.1021/jm0613121
日期:2007.5.1
while inhibiting drug-resistant RT variants more efficiently than the clinically used drug, nevirapine (11-cyclopropyl-5,11-dihydro-4-methyl-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-o ne). 5f also inhibited the RT ribonuclease H activity with an IC50 of 20 microM and therefore, unlike nevirapine, targets both RT activities. Accordingly, 5f can serve as lead for developing novel inhibitors against