期刊
ORGANIC LETTERS
卷 23, 期 6, 页码 2135-2139出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c00290
关键词
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资金
- National Natural Science Foundation of China [22088102, 21933007, 21861132004]
- Ministry of Science and Technology of China [2017YFA0206903]
- Strategic Priority Research Program of the Chinese Academy of Science [XDB17000000]
- Key Research Program of Frontier Sciences of the Chinese Academy of Science [QYZDY-SSW-JSC029]
- K. C. Wong Education Foundation
This study presents the first example of synthesizing carbazoles through oxidative cyclization of 3-alkenylindoles with styrenes under visible light. Using [Ir(dtbbpy)(ppy)(2)][PF6] as the photocatalyst enables the tandem reaction to proceed efficiently, leading to carbazole derivatives in good to excellent yields. The mechanistic studies suggest that the tandem reaction is driven by photoinduced energy transfer followed by electron transfer.
Reported herein is the first example of the synthesis of carbazoles via oxidative cyclization of 3-alkenylindoles with styrenes under visible light. The irradiation of a catalytic amount of [Ir(dtbbpy)(ppy)(2)][PF6] as the photocatalyst enables various 3-alkenylindoles and styrenes to undergo tandem [2 + 2] cycloaddition/rearrangement, thereby leading to carbazole derivatives in good to excellent yields under aerobic conditions. Mechanistic studies reveal that photoinduced energy transfer followed by electron transfer is responsible for the tandem reaction.
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