Journal
CHINESE JOURNAL OF ORGANIC CHEMISTRY
Volume 39, Issue 8, Pages 2175-2182Publisher
SCIENCE PRESS
DOI: 10.6023/cjoc201904082
Keywords
domino reaction; allenoate; benzothiophene derivatives
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Funding
- National Natural Science Foundation of China [21403154]
- Natural Science Foundation of Tianjin City [17JCZDJC37700]
- Tianjin Municipal Education Commission [20180KJ137]
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A 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalyzed [4+2] annulation reaction between 2-alkylidenebenzothio phene-3(2H)-ones and allenoate has been developed. The substrate scope includes both electron-withdrawing and electron-donating groups on the benzothiophene moiety. This method can be carried out under mild conditions and gives a wide range of highly functionalized benzothiophene-fused gamma-pyran derivatives in good yields with moderate selectivity.
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