Diastereoselective Synthesis of Spiropyrazolones via 1,3-Dipolar [3+2] Cycloadditions between Pyrazolone-Based Olefins and N,N′-Cyclic Azomethine Imines

被引:4
|
作者
Tang, Zhe [1 ]
Wu, Hui-Hui [1 ]
Xiao-Zu Fan [1 ]
Zhang, Heng [1 ]
Cai, Lu-Yu [1 ]
Bi, Xiao-Fan [1 ]
Zhao, Hong-Wu [1 ]
机构
[1] Beijing Univ Technol, Coll Life Sci & Bioengn, Beijing Key Lab Environm & Viral Oncol, 100 Pingleyuan, Beijing 100124, Peoples R China
关键词
1,3-dipolar [3+2] cycloaddition; pyrazolone-based olefin; N; N '-cyclic azomethine imine; spiropyrazolone; diastereoselectivity; SPIROCYCLIC PYRAZOLONE; ASYMMETRIC-SYNTHESIS; ANNULATION REACTION; CONSTRUCTION;
D O I
10.1055/a-1506-4509
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Under the catalysis of PhCO2H, the 1,3-dipolar [3+2] cycloaddition between pyrazolone-based olefins and N,N'-cyclic azomethine imines proceeded readily, thus delivering structurally novel spiropyrazolones with up to 98% yield and >20:1 dr. The relative stereochemical configuration of the obtained spiropyrazolones was unambiguously assigned by X-ray single-crystal structure analysis. The diastereoselective formation of the title spiropyrazolones was interpreted by the hypothesized reaction mechanism.
引用
收藏
页码:1201 / 1206
页数:6
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