Ensembles of Metal Triflate Additives in Gold(I)-Catalyzed Formal [2 + 2 + 2] Cycloaddition of Carbonyls with Activated Terminal Alkynes: One-Pot Synthesis of 2H-Pyrans
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Title
- Ensembles of Metal Triflate Additives in Gold(I)-Catalyzed Formal [2 + 2 + 2] Cycloaddition of Carbonyls with Activated Terminal Alkynes: One-Pot Synthesis of 2H-Pyrans
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Author(s)
- Sung, Dan Bi; Lee, Jong Seok
- KIOST Author(s)
- Sung, Dan Bi(성단비); Lee, Jong Seok(이종석)
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Alternative Author(s)
- 성단비; 이종석
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Publication Year
- 2023-09
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Abstract
- Herein, we describe a gold(I)-catalyzed intermolecular formal [2 + 2 + 2] cycloaddition of a carbonyl compound and a propiolate. A series of highly substituted 2H-pyrans are accessed regioselectively from acyclic and cyclic ketones and aldehydes with various substituted propiolates using Ph3PAuCl (0.1–1 mol %) with two distinct metal triflate additives [0.75–7.5 mol %; In(OTf)3/Cu(OTf)2 for ketones, Bi(OTf)3/Hf(OTf)4 for aldehydes]. This method should provide an opportunity for further development of synthetic access to other heterocyclic compounds.
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ISSN
- 1523-7060
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/44666
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DOI
- 10.1021/acs.orglett.3c02536
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Bibliographic Citation
- Organic Letters, v.25, no.39, pp.7110 - 7114, 2023
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Publisher
- American Chemical Society
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Keywords
- Aldehydes; Alkyls; Carbonyls; Cyclization; Ketones
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Type
- Article
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Language
- English
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Document Type
- Article; Early Access
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