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Your search keyword '"Yang, Na"' showing total 2 results
Start Over Author "Yang, Na" Topic ring formation (chemistry) Publisher royal society of chemistry
2 results on '"Yang, Na"'

1. Electrochemical oxidation-induced benzylic C(sp3)–H functionalization towards the atom-economic synthesis of oxazole heterocycles.

Author

Yang, Na, Li, Anni, Gao, Hui, Liao, Li-Mei, Yang, Yu-Ping, Wang, Pei-Long, and Li, Hongji

Subjects
*HETEROCYCLIC compounds, *NITRILES, *ALKYNES, *OXIDIZING agents, *CATALYSTS, *RING formation (Chemistry)
Abstract

A unique electrochemical four-component reaction of terminal alkynes, (thio)xanthenes, nitriles, and water has been established in the absence of any catalyst or external oxidant. This electrochemical reaction features high atom economy and mild conditions, affording oxazole derivatives in moderate to good yields. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Metal-free dearomative [5+2]/[2+2] cycloaddition of 1H-indoles with ortho-(trimethylsilyl)aryl triflates.

Author

Chen, Xinyu, Yang, Na, Zeng, Wen, Wang, Lei, Li, Pinhua, and Li, Hongji

Subjects
*RING formation (Chemistry), *STERIC hindrance, *INDOLE
Abstract

Herein, we report a mild dearomative [5+2]/[2+2] cycloaddition of 1H-indoles with ortho-(trimethylsilyl)aryl triflates. The unique [5+2] cycloaddition enables the synthesis of a series of dibenzo[b,e]azepine derivatives in moderate to good yields. Increasing the steric hindrance at the C2-position of 1H-indoles leads to the [2+2] cycloaddition. Mechanistic investigations support that the reaction of 1H-indoles with arynes undergoes a [2+2] cycloaddition step, followed by a ring expansion to the [5+2] cycloaddition product. [ABSTRACT FROM AUTHOR]

Published
2021
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