期刊
ORGANIC LETTERS
卷 17, 期 5, 页码 1106-1109出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.5b00359
关键词
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资金
- NSFC [21272066, 21472042]
- Fundamental Research Funds for the Central Universities
- Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China [131011]
- NCET [12-0851]
The DABCO-catalyzed divergent (4 + 2) annulations of d-acetoxy allenoates 1 are reported. The chemical behavior of 1 under DABCO catalyst was found to be substrate dependent. Allenoate 1 with an aromatic group at dC preferentially reacted with salicylaldehyde derivative 2, delivering 4H-chromenes 3. On the other hand, allenoates 1 with an alkyl group at delta C readily underwent (4 + 2) annulations with oxo diene 4 to afford 4H-pyrans 5.
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