ON THE REACTION OF N-VINYLIMINOPHOSPHORANES .16. A NEW SYNTHESIS OF 5H-INDENO[1,2-B]PYRIDINES AND 5H-INDENO[1,2-B]PYRIDIN-5-ONES

被引:34
|
作者
NITTA, M
OHNUMA, M
LINO, Y
机构
关键词
D O I
10.1039/p19910001115
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Thermal reaction of tributyl(inden-3-ylimino)phosphorane with alpha, beta-unsaturated ketones and aldehydes led to a Michael-type C-C bond formation and subsequent aza-Wittig reaction to give 5H-indeno(1,2-b)pyridines in good to modest yield. The products were oxidized conveniently by chromium trioxide and t-butyl hydroperoxide to give 5H-indeno[1,2-b]pyridin-5-ones, including the 4-azafluorenone alkaloid onychine.
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页码:1115 / 1118
页数:4
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