已实现了钯催化的三组分羰基化反应,该反应可从酰氯和NaN 3合成3 H -1,2,4-三唑-3-酮。该反应大概通过级联羰基化,酰基叠氮化物形成,Curtius重排和分子内亲核加成序列进行。以中等至优异的产率构建了各种结构多样的3 H -1,2,4-三唑-3-酮。1,2,3,5-三甲酸三苯酯(TFBen)被用作固体和方便的一氧化碳替代物。
[EN] HYDRAZIDE DERIVATIVES AND THEIR SPECIFIC USE AS ANTIBACTERIAL AGENTS BY CONTROLLING ACINETOBACTER BAUMANNII BACTERIUM<br/>[FR] DÉRIVÉS D'HYDRAZIDE ET LEUR UTILISATION SPÉCIFIQUE EN TANT QU'AGENTS ANTIBACTÉRIENS POUR LUTTER CONTRE UNE BACTÉRIE ACINETOBACTER BAUMANNII
申请人:YNCREA HAUTS DE FRANCE
公开号:WO2020169682A1
公开(公告)日:2020-08-27
The present invention relates to compounds of the following general formula (I): or a pharmaceutically acceptable salt and/or solvate thereof, their use as a drug, in particular as antibacterial agent, notablyforpreventingand/or treating disorders associated to Acinetobacter baumannii. The present invention also relates to pharmaceutical compositions containing said compoundsand the process for preparing said compounds.
A nickel-promoted cascadeannulation reaction for the facile synthesis of 3H-1,2,4-triazol-3-ones from readily available hydrazonoyl chlorides and sodium cyanate has been developed. The transformation occurs through a cascade nickel-promoted intermolecular nucleophilic addition–elimination process, intramolecular nucleophilic addition, and a hydrogen-transfer sequence. The method has been successfully
已经开发了镍促进的级联环化反应,用于从容易获得的酰肼基氯和氰酸钠容易地合成3 H -1,2,4-三唑-3-酮。通过级联镍促进的分子间亲核加成-消除过程,分子内亲核加成和氢转移序列进行转化。该方法已成功应用于血管紧张素II拮抗剂的核心骨架的构建。
Regioselective Decarboxylative Cycloaddition Route to Fully Substituted 3‐CF
<sub>3</sub>
‐Pyrazoles from Nitrilimines and Isoxazolidinediones
作者:Yu‐Chen Tian、Jun‐Kuan Li、Fa‐Guang Zhang、Jun‐An Ma
DOI:10.1002/adsc.202100091
日期:2021.4.13
1,4‐Diaryl‐5‐carboxamido substituted 3‐trifluoromethylpyrazoles are obtained with exclusive regioselectivity under transition‐metal‐free conditions. This decarboxylative [3+2] cycloaddition protocol was enabled by employing trifluoromethyl nitrilimines as 1,3‐dipoles, and isoxazolidinediones as CO2‐masked alkynyl dipolarophiles. The applicability of this method is further manifested by its compatibility
(PBu3)-promoted annulation reaction at room temperature. In this synthetic process, crude less stable N-aroyldiazene intermediates generated by I2-mediated oxidation of hydrazides were used directly in a subsequent annulation reaction to afford the selenadiazole products. The merits of the present synthetic strategy also include absence of transition metals and gram-scale synthesis.
2-亚氨基-1,3,4-硒二唑衍生物可以在室温下通过连续氧化和三丁基膦 (PBu 3 ) 促进的环化反应从酰肼和异硒氰酸酯合成。在该合成过程中,由 I 2 -介导的酰肼氧化产生的较不稳定的粗N-芳酰基二氮中间体直接用于随后的环化反应,以提供硒二唑产物。本合成策略的优点还包括没有过渡金属和克级合成。