prepared and tested as simple catalysts of oxidations with hydrogen peroxide, using sulfoxidation as a model reaction. Their catalyticefficiency strongly depends on the type of substituent and is remarkable for derivatives with an electron-withdrawing group, showing reactivity comparable to that of flaviniumsalts which are the prominent organocatalysts for oxygenations. Because of their high stability
制备了一系列的单取代的嘧啶鎓和吡嗪鎓三氟甲磺酸酯和3,5-二取代的吡啶鎓三氟甲磺酸酯,并使用硫氧化作为模型反应,对过氧化氢的简单氧化催化剂进行了测试。它们的催化效率在很大程度上取决于取代基的类型,并且对于具有吸电子基团的衍生物而言是显着的,其反应性与黄酮盐相当,后者是氧合作用的主要有机催化剂。由于它们的高稳定性和良好的可及性,4-(三氟甲基)嘧啶鎓和3,5-二硝基吡啶鎓三氟甲磺酸盐是选择的催化剂,并显示出催化脂肪族和芳香族硫化物氧化为亚砜的作用,定量转化率高,制备产率高,并且具有优异的性能。化学选择性。K R +值(p K R + <5)和较小的负还原电位(E red > -0.5 V)。在催化氧化过程中原位形成的过氧化氢加合物充当底物氧化剂。通过在B3LYP / 6-311 ++ g(d,p)水平上的计算获得的从这些杂环氢过氧化物到硫代苯甲醚的转移的吉布斯自由能表明,它们是比烷基氢过氧化
Amidation of esters assisted by Mg(OCH3)2 or CaCl2
作者:Mark W. Bundesmann、Steven B. Coffey、Stephen W. Wright
DOI:10.1016/j.tetlet.2010.05.075
日期:2010.7
Magnesium methoxide (Mg(OCH3)2) and calcium chloride have been shown to facilitate the direct aminolysis of esters by ammonia to primary amides. Methyl, ethyl, isopropyl, and tert-butyl esters were converted to the corresponding carboxamides in good yields. Reactions have been run on a larger scale and without the safety liability inherent in the use of magnesium nitride (Mg3N2). Ammonium chloride
甲醇镁(Mg(OCH 3)2)和氯化钙已被证明可以促进氨将酯直接氨解为伯酰胺。将甲基,乙基,异丙基和叔丁基酯以良好的产率转化为相应的羧酰胺。反应已进行了较大规模,并且没有使用氮化镁(Mg 3 N 2)时固有的安全隐患。氯化铵和胺盐酸盐已成功用于代替甲醇与甲醇镁。
Reaction of β-alkoxyvinyl α-ketoesters with acyclic NCN binucleophiles – Scalable approach to novel functionalized pyrimidines
作者:Oleksandr O. Stepaniuk、Tymofii V. Rudenko、Bohdan V. Vashchenko、Vitalii O. Matvienko、Ivan S. Kondratov、Andrey A. Tolmachev、Oleksandr O. Grygorenko
DOI:10.1016/j.tet.2019.05.005
日期:2019.6
protocols for synthesis of series of low-molecular-weight di- and tri-substituted pyrimidines bearing a functional group at the 4th position, which rely on a base-mediated condensation of amidines or guanidines with β-alkoxyvinyl α-keto esters, have been developed. This approach allowed for multigram preparation of novel pyrimidine-4-carboxylates in 21–90% yield. The synthetic utility of these compounds
申请人:Stichting Het Nederlands Kanker Instituut-
Antoni van Leeuwenhoek Ziekenhuis
公开号:EP3875452A1
公开(公告)日:2021-09-08
Provided are compounds of formula (I), or a pharmaceutically acceptable salt or solvate thereof:
Also provided are compositions comprising compounds of formula (I). The compounds and compositions are also provided for use as medicaments, for example as medicaments useful in the treatment of a condition modulated by monoacylglycerol lipase (MAGL). Also provided are the use of compounds and compositions for the inhibition of monoacylglycerol lipase (MAGL).
[EN] MULTISUBSTITUTED AROMATIC COMPOUNDS AS SERINE PROTEASE INHIBITORS<br/>[FR] COMPOSÉS AROMATIQUES MULTISUBSTITUÉS EN TANT QU'INHIBITEURS DE SÉRINE PROTÉASE
申请人:VERSEON INC
公开号:WO2014145986A1
公开(公告)日:2014-09-18
There are provided inter alia multisubstituted aromatic compounds useful for the inhibition of kallikrein, which compounds include substituted pyrazolyl or substituted triazolyl. There are additionally provided pharmaceutical compositions. There are additionally provided methods of treating and preventing certain diseases or disorders, which disease or disorder is amenable to treatment or prevention by the inhibition of kallikrein.