Fast and efficient one step synthesis of dienamides
作者:Jennifer E. Mathieson、James J. Crawford、Marc Schmidtmann、Rodolfo Marquez
DOI:10.1039/b901797f
日期:——
A fast and efficient one-step approach to the synthesis of dienamides is reported. This concise methodology relies on the use of imides as reactive intermediates and allows for the preferential formation of Z,E-dienamides in good yields.
The generation and trapping of organozinc carbenoids from N-diethoxymethyl amides: a new amidocyclopropanation reaction
作者:Guillaume Bégis、David Cladingboel、William B. Motherwell
DOI:10.1039/b309887g
日期:——
Amidocyclopropanes are readily prepared by reaction of N-diethoxymethyl amides with alkenes in the presence of zinc amagalm, zinc chloride and chlorotrimethylsilane.
An Efficient Approach to the Stereocontrolled Synthesis of Enamides
作者:Mathew V. J. Villa、Sarah M. Targett、John C. Barnes、William G. Whittingham、Rodolfo Marquez
DOI:10.1021/ol070336e
日期:2007.4.1
[reaction: see text] A fast, flexible, and efficient approach for the stereocontrolledsynthesis of enamides has been developed starting from lactams and amides through the use of imides. This new approach provides access to enamide systems not easily or currently accessible through other approaches.
Although aerobic oxidative acylation of amides with alcohols would be a good complement to classical synthetic methods for imides (e.g., acylation of amides with activated forms of carboxylic acids), to date, there have been no reports on oxidative acylation to produce imides. In this study, we successfully developed, for the first time, an efficient method for the synthesis of imides through aerobic oxidative acylation
尽管酰胺与醇的有氧氧化酰化是对酰亚胺的经典合成方法(例如,用活化形式的羧酸酰化酰胺)的良好补充,但迄今为止,还没有关于氧化酰化生产酰亚胺的报道。在本研究中,我们首次成功开发了一种采用 CuCl/TMEDA/nor-AZADO 催化剂体系(TMEDA = 四甲基乙二胺;nor-AZADO = 9-氮杂金刚烷N-氧基)。所提出的酰化通过以下顺序反应进行:醇有氧氧化成醛,酰胺与醛亲核加成形成半酰胺中间体,以及半酰胺中间体有氧氧化得到相应的酰亚胺。该催化系统利用O 2作为终端氧化剂并产生水作为唯一的副产物。实现这种有效酰化系统的一个重要点是TMEDA配体的利用,据我们所知,该配体尚未在之前报道的Cu/配体/ N-氧基系统中使用。基于实验证据,我们认为 TMEDA 的可能作用包括促进半酰胺氧化和从 Cu I物种再生活性 Cu II -OH 物种。这里促进半酰胺氧化尤其重要。利用所提出的系统,可以从醇
Metal‐Ligand Cooperativity in Mn
<sup>I</sup>
‐Catalysed N‐Formylation of Secondary Amides and Lactams Using CO
<sub>2</sub>
at Room Temperature
作者:Soumi Chakraborty、Rounak Nath、Anuj Kumar Ray、Ankan Paul、Swadhin K. Mandal
DOI:10.1002/chem.202202710
日期:2023.2
A MnI complex coordinated with a redox non-innocent phenalenyl (PLY) ligand is reported for catalytic N-formylation of secondary amides (including late-stage diversification of pharmaceutics) and lactams with CO2 as C1 source at room temperature for the first time. A combined approach of experimental analysis and DFT calculations sketch the plausible radical-mediated pathway of an unconventional metal-ligand
据报道, Mn I络合物与氧化还原非无害苯二甲酰 (PLY) 配体配位,首次在室温下以 CO 2作为 C 1源催化仲酰胺(包括后期药物多样化)和内酰胺的 N-甲酰化时间。实验分析和 DFT 计算的组合方法描绘了一种非常规金属-配体合作的可能的自由基介导途径,涉及以配体为中心的自由基。