Palladium-catalyzed carbonylative cyclization of 2-bromobenzaldehyde with primary amines leading to isoindolin-1-ones
作者:Chan Sik Cho、Wen Xiu Ren
DOI:10.1016/j.tetlet.2009.02.109
日期:2009.5
2-Bromobenzaldehyde is carbonylativelycyclized with primary amines under carbon monoxide pressure in DMF at 100 °C in the presence of a catalytic amount of a palladium catalyst to give the corresponding isoindolin-1-ones in moderate to high yields.
Ambient Reductive Amination of Levulinic Acid to Pyrrolidones over Pt Nanocatalysts on Porous TiO<sub>2</sub> Nanosheets
作者:Chao Xie、Jinliang Song、Haoran Wu、Yue Hu、Huizhen Liu、Zhanrong Zhang、Pei Zhang、Bingfeng Chen、Buxing Han
DOI:10.1021/jacs.8b13024
日期:2019.3.6
Construction of N-substituted pyrrolidones from biomass-derived levulinicacid (LA) via reductive amination is a highly attractive route for biomass valorization. However, realizing this transformation using H2 as the hydrogen source under mild conditions is still very challenging. Herein, we designed porous TiO2 nanosheets-supported Pt nanoparticles (Pt/P-TiO2) as the heterogeneous catalyst. The prepared Pt/P-TiO2
通过还原胺化从生物质衍生的乙酰丙酸 (LA) 构建 N 取代的吡咯烷酮是一种极具吸引力的生物质价值化途径。然而,在温和条件下使用 H2 作为氢源实现这种转化仍然非常具有挑战性。在此,我们设计了多孔 TiO2 纳米片负载的 Pt 纳米粒子(Pt/P-TiO2)作为多相催化剂。制备的 Pt/P-TiO2 在环境温度和 H2 压力下对 LA 的还原胺化非常有效,以生产各种 N-取代的吡咯烷酮(34 个实例)。同时,Pt/P-TiO2对乙酰丙酸酯、4-乙酰丁酸、2-乙酰苯甲酸和2-羧基苯甲醛的还原胺化显示出良好的适用性。
One-pot synthesis of pyrrolidones from levulinic acid and amines/nitroarenes/nitriles over the Ir-PVP catalyst
The synthesis of pyrrolidones via reductive amination of levulinic acid with aniline was examined over polypyrrolidone-stabilized metal nanoparticle catalysts. Among them, Ir metal was the most effective and applicable for the reductive amination of levulinic acid with nitroarenes/nitriles. Importantly, this catalyst was used for the one-potsynthesis of the anti-inflammatory drug indoprofen from 2-formylbenzoic
Direct Synthesis of Lactams from Keto Acids, Nitriles, and H<sub>2</sub>
by Heterogeneous Pt Catalysts
作者:S. M. A. H. Siddiki、Abeda S. Touchy、Ashvini Bhosale、Takashi Toyao、Yuji Mahara、Junya Ohyama、Atsushi Satsuma、Ken-ichi Shimizu
DOI:10.1002/cctc.201701355
日期:2018.2.21
We report herein the first general catalytic system for the direct synthesis of N‐substituted γ‐ and δ‐lactams by reductive amination/cyclization of keto acids (including levulinic acid) with nitriles and H2 under mild conditions (7 bar H2, 110 °C, solvent free). The most effective catalyst, Pt and MoOx co‐loaded TiO2 (Pt‐MoOx/TiO2), shows a wide substrate scope, high turnover number (TON), and good
我们在此报告的第一一般催化系统用于直接合成的N-取代的γ-和δ-内酰胺通过酮酸(包括乙酰丙酸)与腈和H还原胺化/环化2在温和条件下(7巴ħ 2,110 °C,无溶剂)。最有效的催化剂是Pt和MoO x共负载的TiO 2(Pt-MoO x / TiO 2),具有广泛的底物范围,高周转率(TON)和良好的可重复使用性。
Benzisothiazolinone as a useful template for the design of new monoacylglycerol lipase inhibitors: Investigation of the target residues and comparison with octhilinone
作者:Nicolas Matuszak、Bouazza Es Saadi、Geoffray Labar、Jacqueline Marchand-Brynaert、Didier M. Lambert
DOI:10.1016/j.bmcl.2011.10.026
日期:2011.12
The regulation of 2-arachidonoylglycerol (2-AG) levels is a major issue as 2-AG has been proven to participate in numerous physiopathological phenomena such as neuroprotection or analgesia. Octhilinone, a cysteine-reagent compound, has recently been shown to inhibit in the nanomolar range monoacylglycerol lipase (MAGL), the major enzyme responsible for the degradation of 2-AG. Here, we further investigate the mechanism by which octhilinone and its benzisothiazolinone analog inhibit human MAGL. We also provide new information on the structural requirements for MAGL inhibition by these compounds. Finally, we describe for N-octylbenzisothiazolinone a mode of inhibition which is partially different from that described for octhilinone, especially with regard to the targeted cysteine residues in the vicinity of the catalytic site. (C) 2011 Elsevier Ltd. All rights reserved.