期刊
ORGANIC LETTERS
卷 15, 期 24, 页码 6206-6209出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol4030474
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资金
- NSFC [21125206, 21372160]
- National Basic Research Program of China (973 Program) [2010CB833300]
Electron-deficient 1-aza-1,3-butadienes containing a 1,2-benzoisothiazole-1,1-dioxide or 1,2,3-benzoxathiazine-2,2-dioxide motif act as regio- and chemoselective dienophiles in normal-electron-demand Diels-Alder reactions with HOMO-raised trienamines, rather than typical 4 pi-participation in inverse-electron-demand versions. The enantioenriched cycloadducts could be efficiently converted to spiro or fused frameworks with high structural and stereogenic complexity by a sequential aza-benzoin reaction or other transformations.
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