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Yang Z, Sun F, Li Y, Yang K, Zhang J, Xu L, Zhao H, Du Y. Synthesis of 2-Fluoroalkylated Oxazoles from β-Monosubstituted Enamines via Fluoroacyloxylation and Cyclization Mediated by Fluoroalkyl-Containing Hypervalent Iodine(III) Species Generated In Situ. J Org Chem 2023. [PMID: 37450647 DOI: 10.1021/acs.joc.3c01032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A metal-free synthesis of a series of fluoroalkyl-containing oxazoles from β-monosubstituted enamines was developed. This fluoroacyloxylation/cyclization cascade process was mediated by fluoroalkyl-containing hypervalent iodine(III) species formed in situ from the reaction of phenyliodine(III) diacetate (PIDA) and RCF2CO2H (R = H, Cl, Br, F, CF3, CH3, Ph, SAr, OAr).
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Affiliation(s)
- Zhifang Yang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Fengxia Sun
- Research Center for Chemical Safety & Security and Verification Technology & College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yadong Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Kaiyue Yang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Jianing Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Lingzhi Xu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Hui Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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Ramkumar N, Baumane L, Zacs D, Veliks J. Merging Copper(I) Photoredox Catalysis and Iodine(III) Chemistry for the Oxy-monofluoromethylation of Alkenes. Angew Chem Int Ed Engl 2023; 62:e202219027. [PMID: 36692216 DOI: 10.1002/anie.202219027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/25/2023]
Abstract
A simple process for the oxy-monofluoromethylation of alkenes is described. In combination with visible-light copper(I) photoredox catalysis, an easily accessible iodine(III) reagent containing monofluoroacetoxy ligands serves as a powerful source of a monofluoromethyl (CH2 F) radical, enabling the step economical synthesis of γ-fluoro-acetates from a broad range of olefinic substrates under mild conditions. Applications to late-stage diversification of alkenes derived from complex molecules, amino acids and the synthesis of fluoromethylated heterocycles are also demonstrated.
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Affiliation(s)
- Nagarajan Ramkumar
- Latvian Institute of Organic Synthesis, Aizkraukles iela 21, LV-1006, Riga, Latvia
| | - Larisa Baumane
- Latvian Institute of Organic Synthesis, Aizkraukles iela 21, LV-1006, Riga, Latvia
| | - Dzintars Zacs
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes iela 3, LV-1076, Riga, Latvia
| | - Janis Veliks
- Latvian Institute of Organic Synthesis, Aizkraukles iela 21, LV-1006, Riga, Latvia
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Chen XY, Zhang X, Wan JP. Recent advances in transition metal-free annulation toward heterocycle diversity based on the C-N bond cleavage of enaminone platform. Org Biomol Chem 2022; 20:2356-2369. [DOI: 10.1039/d2ob00126h] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enaminones and analogous stable enamines are well known as platform building blocks in organic synthesis for construction of heterocyclic compounds, especially N-heterocycles. To date, especially enaminones have been successfully...
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Solomin VV, Radchenko DS, Slobodyanyuk EY, Geraschenko OV, Vashchenko BV, Grygorenko OO. Widely Exploited, Yet Unreported: Regiocontrolled Synthesis and the Suzuki-Miyaura Reactions of Bromooxazole Building Blocks. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Vitalii V. Solomin
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Dmytro S. Radchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Evgeniy Y. Slobodyanyuk
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv 02660; Ukraine
| | - Oleksandr V. Geraschenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
| | - Bohdan V. Vashchenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd. (www.enamine.net), Chervonotkatska Street 78, Kyiv 02094, Ukraine, Chervonotkatska Street 78, Kyiv; 02094 Ukraine
- Taras Shevchenko National University of Kyiv; Ukraine
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