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Dong CL, Liu HC, Guan Z, He YH. Photoredox-Neutral Radical-Radical Cross-Coupling of Isatins and Benzyl Carboxylic Acids. J Org Chem 2024; 89:10929-10938. [PMID: 39034667 DOI: 10.1021/acs.joc.4c01268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
A photoredox-neutral radical-radical cross-coupling is described for the synthesis of 3-hydroxy-3-alkyloxindoles using isatins and benzyl carboxylic acids as substrates and 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) as the photocatalyst. The method features a broad substrate scope and good functional group tolerance, providing 30 sterically hindered alcohols with moderate to excellent yields. This approach utilizes inexpensive and commercially available starting materials, avoiding the use of transition metals, extra oxidants/reductants, and harsh reaction conditions, showcasing significant applicability and environmental friendliness.
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Affiliation(s)
- Chun-Lin Dong
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Han-Chi Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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Chen Y, Yang R, Xiao F, Xu T, Mao G, Deng GJ. Copper-Catalyzed Synthesis of 3-Aryl-9 H-imidazo[1,5- a]indol-9-ones Using Oxygen as the Sole Oxidant. Org Lett 2023; 25:3702-3707. [PMID: 37184361 DOI: 10.1021/acs.orglett.3c01148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A three-component strategy was developed for 3-phenyl-9H-imidazo[1,5-a]indol-9-one preparation from indole-2-carboxaldehydes, aromatic aldehydes, and ammonium acetate under copper catalysis conditions. In this process, a new five-membered ring was formed and the C3 position in the indole substrate was selectively oxidized into a ketone skeleton using oxygen as the sole oxidant and ammonium acetate as the nitrogen source. Furthermore, same products also could be achieved from indole-2-carboxaldehydes and benzyl amines under similar reaction conditions.
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Affiliation(s)
- Yufeng Chen
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
| | - Ruitong Yang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
| | - Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
| | - Tianci Xu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
| | - Guojiang Mao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
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Tewari U, Sharma D, Srivastava S, Kumar BK, Faheem, Murugesan S. Anti‐Tubercular Insights of Carbolines – A Decade Critique. ChemistrySelect 2021. [DOI: 10.1002/slct.202100181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Upasana Tewari
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
| | - Divya Sharma
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
| | - Shrey Srivastava
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
| | - Banoth Karan Kumar
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
| | - Faheem
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
| | - Sankaranarayanan Murugesan
- Medicinal Chemistry Research Laboratory Department of Pharmacy Birla Institute of Technology and Science Pilani, Pilani Campus Pilani 333031 Rajasthan India
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