Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles

Qiao, Hongwei; Bai, Jiakun; Zhu, Mengyao; Gao, Juanhong; Anna,; Zhang, Sichun; Li, Chao

doi:10.3390/catal10080920

Open AccessCommunication

Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles

by

Hongwei Qiao

^1,†,

Jiakun Bai

^2,†,

Mengyao Zhu

²,

Juanhong Gao

²,

Anna

²

,

Sichun Zhang

^1,* and

Chao Li

^2,*

¹

Department of Chemistry, Tsinghua University, Beijing 100084, China

²

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

^*

Authors to whom correspondence should be addressed.

^†

H.Q. and J.B. contributed equally to this work.

Catalysts 2020, 10(8), 920; https://doi.org/10.3390/catal10080920

Submission received: 4 July 2020 / Revised: 6 August 2020 / Accepted: 6 August 2020 / Published: 11 August 2020

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Abstract

An efficient synthetic method of tetracyclic 3,4-fused indoles and dihydroindoles via rhodium-catalyzed (3+2) cycloaddition of N-tosyl-4-(2-phenoxyphenyl)-1,2,3-triazole was described. The aromatized xanthene derivatives can be achieved in a one-pot synthesis starting from 1-ethynyl-2-phenoxybenzene. The xanthene-based fused heterocycles were considered as the valuable fluorophore.

Keywords: rhodium catalysis; xanthene; cycloaddition; triazole; fluorophore

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MDPI and ACS Style

Qiao, H.; Bai, J.; Zhu, M.; Gao, J.; Anna; Zhang, S.; Li, C. Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles. Catalysts 2020, 10, 920. https://doi.org/10.3390/catal10080920

AMA Style

Qiao H, Bai J, Zhu M, Gao J, Anna, Zhang S, Li C. Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles. Catalysts. 2020; 10(8):920. https://doi.org/10.3390/catal10080920

Chicago/Turabian Style

Qiao, Hongwei, Jiakun Bai, Mengyao Zhu, Juanhong Gao, Anna, Sichun Zhang, and Chao Li. 2020. "Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles" Catalysts 10, no. 8: 920. https://doi.org/10.3390/catal10080920

APA Style

Qiao, H., Bai, J., Zhu, M., Gao, J., Anna, Zhang, S., & Li, C. (2020). Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles. Catalysts, 10(8), 920. https://doi.org/10.3390/catal10080920

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Rhodium (II)-Catalyzed Synthesis of Tetracyclic 3,4-Fused Indoles and Dihydroindoles

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