期刊
ORGANIC LETTERS
卷 21, 期 18, 页码 7613-7618出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b02893
关键词
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资金
- National Key Research and Development Program [2016YFA0202900]
- National Natural Science Foundation of China [21572256]
- Science and Technology Commission of Shanghai Municipality [18XD1405000]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- Shanghai Institute of Organic Chemistry [sioczz201807]
An efficient gold-catalyzed [3 + 2] annulation of benzofurazan N-oxides with ynamides has been developed, which provides a concise and regioselective access to highly functionalized 7-nitroindoles. Although N-oxides are often considered as oxygen transfer reagents in gold catalysis, benzofurazan N-oxide was found to act as a facile precursor for an alpha-imino gold carbene intermediate. Benzofurazan can also react with ynamides to afford quinoxaline N-oxides via a [4 + 2] annulation process.
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