Solar and visible-light active nano Ni/g-C<sub>3</sub>N<sub>4</sub> photocatalyst for carbon monoxide (CO) and ligand-free carbonylation reactions
作者:Mona Hosseini-Sarvari、Zahra Akrami
DOI:10.1039/d0cy01717e
日期:——
novel method that does not utilize ligands, bases, gaseous CO, and special conditions. This procedure is a redox reaction carried out by new economic nano Ni/g-C3N4 at room temperature and under visible light. Mo(CO)6 was used to in situ generate CO, to resolve the problems caused by the use of CO gas. This protocol has the ability to be used on a gram scale by using a continuous flow reactor.
在这项研究中,我们研究了在不存在一氧化碳气体和配体的情况下,各种取代的芳基卤化物,苄基碘化物和碘代环己烷与不同类型的胺和醇之间的氨基和烷氧基羰基化反应。在适当的配体,化学计量的碱和气态一氧化碳的存在下,在高温下进行类似的反应,这会危害有机化学家的健康。我们提出了一种不利用配体,碱,气态CO和特殊条件的新颖方法。该步骤是在室温和可见光下通过新型经济纳米Ni / gC 3 N 4进行的氧化还原反应。Mo(CO)6用于原位产生一氧化碳,以解决由使用一氧化碳气体引起的问题。通过使用连续流动反应器,该协议具有以克为单位使用的能力。
A Stoichiometric Haloform Coupling for Ester Synthesis with Secondary Alcohols
作者:Albert C. Rowett、Stephen G. Sweeting、David M. Heard、Alastair J. J. Lennox
DOI:10.1002/anie.202400570
日期:——
A general haloform coupling reaction for the synthesis of esters from methyl ketones is reported using one equivalent of alcohol. Detailed kinetic modelling studies demonstrate that the key intermediates are formed under equilibrium, which led to the development of conditions that are amenable to secondary alcohols. TOC image: Georges Simon Serullas. Halftone after lithograph by Palley. Wellcome Collection
据报道,用于从甲基酮合成酯的一般卤仿偶联反应使用一种当量的醇。详细的动力学建模研究表明,关键中间体是在平衡下形成的,这导致了适合仲醇的条件的发展。TOC 图片:Georges Simon Serullas。Palley 石版画后的半色调。惠康收藏,公共领域标志。资料来源:Wellcome Collection。
Vitamin B1-catalyzed aerobic oxidative esterification of aromatic aldehydes with alcohols
A straightforward aerobic oxidativeesterification of aryl aldehydes with alcohols has been developed for the synthesis of substituted esters by employing vitamin B1 as a cost-effective, metal-free, and eco-friendly NHC catalyst. Air is used as a green terminal oxidant. The reaction is a useful addition to the existing NHC-catalytic oxidativeesterification.