Diastereoselective synthesis of spiro[chromane-3,3′-indolines] and spiro[chromane-3,2′-indenes] via DBU promoted formal [4 + 2]cycloaddition reaction
In: Green Synthesis and Catalysis, Jg. 3 (2022), Heft 1, S. 53-58
Online
academicJournal
Zugriff:
A new DBU-catalyzed formal [4 + 2] cycloaddition between ortho-hydroxyphenyl-substituted para-quinone methides and electron-deficient dienophiles including 3-methyleneoxindoles and 2-aryldeneindene-1,3-diones was established. A wide range of functionalized spiro[chromane-3,3′-indolines] and spiro[chromane-3,2′-indenes] were successfully synthesized in good yields and with high diastereoselectivity. The features of the reaction included readily available substrates, mild reaction conditions, convenient methodology and good functional group tolerance.
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Diastereoselective synthesis of spiro[chromane-3,3′-indolines] and spiro[chromane-3,2′-indenes] via DBU promoted formal [4 + 2]cycloaddition reaction
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Autor/in / Beteiligte Person: | Wang, Daqian ; Sun, Jing ; Yan, Chao-Guo |
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Zeitschrift: | Green Synthesis and Catalysis, Jg. 3 (2022), Heft 1, S. 53-58 |
Veröffentlichung: | KeAi Communications Co. Ltd., 2022 |
Medientyp: | academicJournal |
ISSN: | 2666-5549 (print) |
DOI: | 10.1016/j.gresc.2021.10.004 |
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