Photochemical Synthesis of 1,4‐Dicarbonyl Containing Quinoxalin‐2(1H)‐Ones through Consecutive Photoredox Catalysis

Advanced Synthesis & Catalysis, Год журнала: 2024, Номер 366(8), С. 1833 - 1839

Опубликована: Фев. 8, 2024

Abstract Herein, we report a photochemical synthesis of 1,4‐dicarbonyl containing quinoxalin‐2(1 H )‐ones through consecutive photoredox catalysed reactions. A wide range C3‐modified were obtained in 53–91% yields by this approach. Mechanistic studies including radical trapping, EPR studies, D‐labelling investigations, and many other control experiments well explained the proposed mechanism.

Язык: Английский

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Differences between two plants fruits: Amomum tsaoko and Amomum maximum, using the SPME-GC–MS and FT-NIR to classification

Arabian Journal of Chemistry, Год журнала: 2024, Номер 17(4), С. 105665 - 105665

Опубликована: Фев. 10, 2024

Also known as Amomum tsaoko Crevost et Lemaire (A. tsaoko), is a spice and medicinal fruit plant that can be used in daily human life for cooking health purposes. In Xishuangbanna (Yunnan Province, China) there an interesting phenomenon where the maximum Roxb. maximum) consumed by local people. The trade played significant role development of civilization histories nations. Both them have high edible value. identification classification metabolic components both are key to driving related industries. We SPME-GC–MS (Non-targeted headspace-solid phase microextraction-gas chromatography-mass spectrometry) its accurate qualitative quantitative performance, combined with multiple analytical methods, explain present fruits these two plants. Next, near-infrared (NIR) technology offers researchers advantage saving time being cost-effective. analyzed characteristic spectral chemical information NIR data. Identified relevant base group vibration mode. After analyzing data both, it was determined total 66 metabolites, 64 from cardamom 29 substance, showing 37 differences. Among 35 had significance level P ≤ 0.05 VIP ≥ 1, totaling 101 substances. This includes terpenes (37.9 %), aldehydes (12.1 organic heterocyclic compounds (7.6 alcohols (6.1 aromatic (4.5 esters ketones %). study validates species provides clear classification, which will beneficial future data-based applications fields food medicine.

Язык: Английский

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Multiple-cycle photochemical cascade reactions

Organic & Biomolecular Chemistry, Год журнала: 2024, Номер 22(11), С. 2156 - 2174

Опубликована: Янв. 1, 2024

In this review, we summarize recent advancements in multiple-cycle photochemical cascade reactions with particulars emphasizing the catalytic activation modes and types of involved.

Язык: Английский

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Electro‐oxidative Methylation of 2‐Isocyanobiaryls Using N,N‐dimethylformamide (DMF) as Carbon Source: Synthesis of 6‐Methylphenanthridines

Chemistry - An Asian Journal, Год журнала: 2024, Номер 19(9)

Опубликована: Март 16, 2024

A benign electrochemical method to access 6-methylphenanthridines from 2-isocyanobiaryls using N,N-dimethylformamide (DMF) as a methyl source is reported. The protocol operates at ambient temperature without the need for harmful methylating reagents. Mechanistic studies suggested that DMF delivered methylene synthon, followed by reduction cathode and tautomerization. offers environmental benefits avoiding metal-based reagents harsh conditions.

Язык: Английский

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Visible-Light-Induced Cascade Cyclization of 1-(2-(Arylethynyl)benzoyl)indoles into Sulfonated Benazepino[1,2-a]indolones

Organic Letters, Год журнала: 2024, Номер 26(50), С. 10982 - 10987

Опубликована: Дек. 10, 2024

1-(2-(Arylethynyl)benzoyl)indoles were developed as an innovative scaffold for radical cascade cyclization under visible-light and mild conditions, enabling efficient synthesis of sulfonated benazepino[1,2-

Язык: Английский

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