Annulations of enantioenriched allenylsilanes with in situ generated iminium ions: stereoselective synthesis of diverse heterocycles.
Annulations of enantioenriched allenylsilanes with in situ generated iminium ions: stereoselective synthesis of diverse heterocycles.
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DOI:
10.1021/ol802618p
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发表时间:
2009-01-15
期刊:
影响因子:
5.2
通讯作者:
Panek JS
中科院分区:
文献类型:
--
作者:
Brawn RA;Panek JS
Highly enantioenriched allenylsilanes participate in Lewis acid mediated annulations with in situ generated iminium ions derived from tert-butyl carbamate and methyl carbamate to selectively form functionalized 4,5-dihydropyrroles and 4,5-dihyrooxazines respectively. The dihydropyrrole products were further elaborated in a stereocontrolled vinylsilane terminated cyclization with in situ generated oxonium ions, resulting in pyranopyrroles.
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