通过分子内环化制备香豆素的改进型金（I）催化体系。

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2024-10-14 DOI:10.1002/asia.202400725

Francesco Ravera, Federico Floreani, Cristina Tubaro, Marco Roverso, Riccardo Pedrazzani, Marco Bandini, Andrea Biffis

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引用次数: 0

摘要

在以离子液体为溶剂的催化体系中，金（I）络合物与 N-heterocyclic carbene (NHC) 配体组成的催化体系与现有体系相比，在标题反应中表现出更高的催化效率，可使用低至 0.01 摩尔%的金。为此，可以使用 IPrAuNTf2 等商用金（I）催化剂。对于苯酚基团上带有夺电子取代基的反应性较低的底物，定制的 NHC-金（I）前催化剂具有更高的反应性，与商用催化剂相比更有优势。

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An Improved Gold(I) Catalytic System for the Preparation of Coumarins via Intramolecular Cyclization.

A catalytic system comprising a gold(I) complex with an N-heterocyclic carbene (NHC) ligand in an ionic liquid as solvent exhibits higher catalytic efficiency compared to state of the art systems in the title reaction, which enables using down to 0.01 mol % gold. A commercial gold(I) catalyst such as IPrAuNTf₂ can be employed for this purpose. In the case of less reactive substrates bearing electron-withdrawing substituents at the phenol moiety, a tailor made NHC-gold(I) precatalyst exhibits improved reactivity and can be advantageously employed compared to the commercial one.

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).