Base-mediated diastereoselective [4+3] annulation of in situ generated ortho-quinone methides with C, N-cyclic azomethine imines

被引:33
|
作者
Xu, Jianfeng [1 ]
Yuan, Shiru [1 ]
Peng, Jingyi [1 ]
Miao, Maozhong [1 ]
Chen, Zhengkai [1 ]
Ren, Hongjun [1 ]
机构
[1] Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
ENANTIOSELECTIVE 1,3-DIPOLAR CYCLOADDITION; ISATIN-DERIVED KETIMINES; BIOMIMETIC SYNTHESES; MELDRUMS ACID; CARBENE; ACCESS; CATALYST; YLIDES; ENALS;
D O I
10.1039/c7ob01783a
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
An efficient [4 + 3] annulation of 2-(1-tosylalkyl) phenols with C, N-cyclic azomethine imines via in situ generation of ortho-quinone methides (o-QMs) under mild basic reaction conditions is disclosed, furnishing biologically interesting seven-membered heterocyclic compounds with moderate to good yields and excellent diastereoselectivities. A gram-scale reaction is performed to demonstrate the potential in industrial application and two transition states are proposed to rationalize the outstanding diastereoselectivity.
引用
收藏
页码:7513 / 7517
页数:5
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