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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
来源:
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.
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页码:1201 / 1206
页数:6
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