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Phosphine-catalyzed regiospecific (3+2) cyclization of 3-nitroindoles with allene esters
被引:26
|作者:
Jin, Li-Wen
[1
]
Jiang, Fei
[1
]
Chen, Ke-Wei
[1
]
Du, Bai-Xiang
[1
]
Mei, Guang-Jian
[1
]
Shi, Feng
[1
]
机构:
[1] Jiangsu Normal Univ, Sch Chem & Mat Sci, Xuzhou 221116, Jiangsu, Peoples R China
关键词:
HIGHLY ENANTIOSELECTIVE SYNTHESIS;
ASYMMETRIC DEAROMATIZATION;
4+2 ANNULATION;
3-ISOTHIOCYANATO OXINDOLES;
1,3-DIPOLAR CYCLOADDITION;
AZOMETHINE YLIDES;
QUINONE METHIDES;
CASCADE REACTION;
INDOLES;
CONSTRUCTION;
D O I:
10.1039/c9ob00432g
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A phosphine-catalyzed regiospecific (3 + 2) cyclization of 3-nitroindoles with allene esters has been established, which constructed indole-fused five-membered rings in good yields (up to 86%). This reaction serves as a powerful method for the construction of indole-fused five-membered rings. In addition, this reaction provides a useful strategy toward settling the challenge of utilizing other 1,3-dipoles or 1,3dipole surrogates to perform (3 + 2) cyclizations with 3-nitroindoles in different catalytic modes, which will enrich the chemistry of nitroindoles and catalytic asymmetric dearomatization cyclizations.
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页码:3894 / 3901
页数:8
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