Issue 41, 2019, Issue in Progress

Iodine-mediated synthesis of benzo[a]fluorenones from yne-enones

Abstract

The chalcones derived from o-alkynylacetophenones and aromatic aldehydes (yne-enones) when heated under reflux with iodine in acetic acid gave a range of benzo[a]fluorenone derivatives in moderate to good yields. The transformation involves the formation of a vinyl indenone intermediate through regioselective alkyne hydration and intramolecular aldol condensation followed by electrocyclic ring closure and aromatization.

Graphical abstract: Iodine-mediated synthesis of benzo[a]fluorenones from yne-enones

Supplementary files

Article information

Article type
Paper
Submitted
29 Mar 2019
Accepted
19 Jul 2019
First published
30 Jul 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 23652-23657

Iodine-mediated synthesis of benzo[a]fluorenones from yne-enones

S. Akbar, V. J. Tamilarasan and K. Srinivasan, RSC Adv., 2019, 9, 23652 DOI: 10.1039/C9RA02376C

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