Atom-Economical and Tandem Conversion of Nitriles to <i>N</i>-Methylated Amides Using Methanol and Water
作者:Bhaskar Paul、Milan Maji、Sabuj Kundu
DOI:10.1021/acscatal.9b03916
日期:2019.11.1
A cobalt complex catalyzed tandem conversion of nitrile to N-methylated amide is described using a methanol and water mixture. Using this protocol, several nitriles were directly and efficiently converted to the desired N-methylated amides. Kinetic experiments using H2O18 and CD3OD suggested that water and methanol were the source of the oxygen atom and methyl group, respectively, in the final N-methylated
描述了使用甲醇和水的混合物的钴络合物催化的腈串联转化为N-甲基化酰胺。使用该方案,将几个腈直接有效地转化为所需的N-甲基化酰胺。使用H 2 O 18和CD 3 OD进行的动力学实验表明,水和甲醇分别是最终N中氧原子和甲基的来源。-甲基化酰胺。重要的是,控制实验实现了活性Co(I)–H物种参与该转化的过程。动力学同位素效应(KIE)研究表明,甲醇C–H键的活化是动力学上重要的一步。哈米特图证实了电子不足的腈的反应更快。此外,计算研究支持了从腈形成N-甲基化酰胺的可能途径。
Rhodium‐Catalyzed Electrooxidative C−H Olefination of Benzamides
作者:Yan Zhang、Julia Struwe、Lutz Ackermann
DOI:10.1002/anie.202005257
日期:2020.8.24
Metal‐catalyzed chelation‐assisted C−H olefinations have emerged as powerful tools for the construction of functionalized alkenes. Herein, we describe the rhoda‐electrocatalyzedC−H activation/alkenylation of arenes. The olefinations of challenging electron‐poor benzamides were thus accomplished in a fully dehydrogenative fashion under electrochemical conditions, avoiding stoichiometric chemical oxidants
金属催化螯合辅助的 C-H 烯化已成为构建功能化烯烃的有力工具。在此,我们描述了 rhoda 电催化芳烃的 C-H 活化/烯基化。因此,具有挑战性的贫电子苯甲酰胺的烯烃化在电化学条件下以完全脱氢的方式完成,避免了化学计量的化学氧化剂,并且 H 2作为唯一的副产物。这种通用的烯基化反应还具有广泛的底物范围和使用电力作为绿色氧化剂。
JAK INHIBITOR
申请人:Kyowa Hakko Kirin Co., Ltd.
公开号:EP2108642A1
公开(公告)日:2009-10-14
A JAK inhibitor comprising, as an active ingredient, a nitrogen-containing heterocyclic compound represented by formula (I)
wherein W represents a nitrogen atom or -CH-;
X represents -C (=O) - or -CHR4- (wherein R4 represents a hydrogen atom, or the like);
R1 represents the formula described below [wherein Q1 represents-CR8-(wherein R8 represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like);
Q2 represents -NR15- (wherein R15 represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like); and R5 and R6 may be the same or different and each represents a hydrogen atom, halogen, carboxy, substituted or unsubstituted lower alkyl, or the like], or the like; and
R2 and R3 may be the same or different and each represents a hydrogen atom, halogen, substituted or unsubstituted lower alkyl, or the like} or a pharmaceutically acceptable salt thereof.
method for the oxidation of benzylic carbons (amines and cyanides) into corresponding benzamides using a catalytic amount of I2 and TBHP as the green oxidant via the C–H bond cleavage of the benzylic carbon undermild reaction conditions. According to the literature survey, this is the first report for the oxidative amidation of benzylamines and decyanation of benzyl cyanides in one pot under metal-free
Ruthenium-Catalyzed Synthesis of N-Methylated Amides using Methanol
作者:Bhaskar Paul、Dibyajyoti Panja、Sabuj Kundu
DOI:10.1021/acs.orglett.9b01925
日期:2019.8.2
An efficient synthesis of N-methylated amides using methanol in the presence of a ruthenium(II) catalyst is realized. Notably, applying this process, tandem C-methylation and N-methylation were achieved to synthesize α-methyl N-methylated amides. In addition, several kinetic studies and control experiments with the plausible intermediates were performed to understand this novel protocol. Furthermore