Metal‐Free, Base‐Promoted, Tandem Pericyclic Reaction: A One‐Pot Approach for Cycloheptane‐Annelated Chromones from γ‐Alkynyl‐1,3‐Diketones.

Autor:	Liang, Yi‐En, Kan, Chih‐Yu, Barve, Balaji D., Kuo, Yao‐Haur, Fang, Hsu‐Wei, Li, Wen‐Tai
Předmět:	PERICYCLIC reactions CHROMONES MICROWAVE chemistry RING formation (Chemistry)
Zdroj:	Advanced Synthesis & Catalysis; 1/18/2022, Vol. 364 Issue 2, p326-331, 6p
Abstrakt:	A microwave‐assisted, base‐promoted, tandem cyclization reaction strategy has been developed for the synthesis of cyclohepta[b]chromones and spiro cyclohepta[b]chromones. Readily accessible γ‐alkynyl‐1,3‐diketones undergo intramolecular cyclization and 7‐endo‐trig carbocyclization to afford various cycloheptane‐annelated chromones in one‐pot reactions. This metal‐free protocol also led to the generation of polycyclic ring with a new C−C bond and a new C−O bond. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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