Massenspektrometrische Untersuchungen an Derivaten der Phenylessigsäure, 1. Mitt.: Verlust ortho-ständiger Substituenten aus Phenylacetamid-Ionen
摘要:
In den EIMS (70 eV) der ortho-substituierten Phenylacetamide 2 und 3 treten für X = Cl, Br, NO2 starke Signale für den Verlust von X-Radikalen auf, der bei niedrigen Anregungsenergien zur dominierenden bzw。einzigen Reaktion der sehr intensitätsschwachen Molekülionen (< 0.1 %) wird。Die ortho-ständigen Reste H, CH3 unf F werden nicht, OCH3 和 CN in nur geringem Maße abgespalten。Der Verlust von o-Cl, o-Br
A versatile and site-selective rhodium(III)-catalyzed aerobic oxidativealkenylation of arylacetamides including primary, secondary, and tertiary amides having a weak O-coordinating acetamide directing group with alkenes is described. In the reaction, air was utilized as a sole oxidant. The reaction was compatible with activated alkenes and maleimides.
The C–H alkylation of arylacetamides with activated alkenes such as substituted acrylates and vinylsulphone in the presence of a ruthenium catalyst and organic acid via the weak O-coordination under the redox free version is described. The present protocol was effective with different substituted arylacetamides including secondary and tertiary amides. The reaction mechanism including the ortho C–H
Direct defluorinative amidation–hydrolysis reaction of <i>gem</i>-difluoroalkenes with <i>N</i>,<i>N</i>-dimethylformamide, and primary and secondary amines
作者:Biyun Wang、Xianghu Zhao、Qingyun Liu、Song Cao
DOI:10.1039/c8ob02322k
日期:——
A novel and efficient method for the synthesis of arylacetamides by the reactions of gem-difluoroalkenes with N,N-dialkylformamides, and primary and secondary amines with the assistance of KOtBu and water was developed.
开发了一种新颖有效的合成方法,该方法通过宝石-二氟烯烃与N,N-二烷基甲酰胺以及伯胺和仲胺在KO t Bu和水的反应下合成芳基乙酰胺。
Catalytic Enantioselective α-Fluorination of 2-Acyl Imidazoles via Iridium Complexes
The first highly enantioselective α‐fluorination of 2‐acylimidazoles utilizing iridium catalysis has been accomplished. This transformation features mild conditions and a remarkably broad substrate scope, providing an efficient and highly enantioselective approach to obtain a wide range of fluorine‐containing 2‐acylimidazoles which are found in a variety of bioactive compounds and prodrugs. A large
Rhodium(III)-Catalyzed Redox-Neutral Weak <i>O</i>-Coordinating Vinylation and Allylation of Arylacetamides with Allylic Acetates
作者:Subramanian Jambu、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.9b01995
日期:2019.7.19
efficient Rh(III)-catalyzed redox-neutral weak O-coordinating vinylation and allylation of arylacetamides with allylic acetates are described. A wide variety of arylacetamides containing primary, secondary, and tertiary amides and substituted allylic acetates was compatible for the reaction. The synthesized ortho-vinylated arylacetamides were converted into ortho-vinylated phenyl aceticacid and biologically