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Copper-mediated construction of benzothieno[3,2-b]benzofurans by intramolecular dehydrogenative C-O coupling reaction
被引:10
作者:
Ai, Liankun
[1
]
Ajibola, Ibrahim Yusuf
[1
]
Li, Baolin
[1
]
机构:
[1] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China
基金:
中国国家自然科学基金;
关键词:
FIELD-EFFECT TRANSISTORS;
FLASH VACUUM PYROLYSIS;
ORGANIC SEMICONDUCTORS;
CYCLIZATION;
DIBENZOFURANS;
ARYLPHENOLS;
DERIVATIVES;
TRANSPORT;
DESIGN;
D O I:
10.1039/d1ra06985c
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
An efficient method to synthesize benzothieno[3,2-b]benzofurans via intramolecular dehydrogenative C-H/O-H coupling has been developed. Good to excellent yields (64-91%) could be obtained no matter if the substituted group is electron-donating or electron-withdrawing. Notably, three-to-six fused ring thienofuran compounds could be constructed using this method. A reaction mechanism study showed that 1,1-diphenylethylene can completely inhibit the reaction. Therefore, it is a radical pathway initiated by single electron transfer between the hydroxyl of the substrate and the copper catalyst.
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页码:36305 / 36309
页数:5
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