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Epoxidation studies of 2-styrylchromones using jacobsen's catalyst and hydrogen peroxide and iodosylbenzene as oxidants

✍ Scribed by Clementina M. M. Santos; Artur M. S. Silva; José A. S. Cavaleiro; Tamás Patonay; Albert Lévai

Publisher: Journal of Heterocyclic Chemistry
Year: 2006
Tongue: English
Weight: 447 KB
Volume: 43
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570430526

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✦ Synopsis

The epoxidation of 2-styrylchromones 2a-h using Jacobsen's Mn(III)[salen] complex 1 as catalyst is reported for the first time. Several studies were performed using both hydrogen peroxide and iodosylbenzene as oxidants, in order to obtain the , -epoxy-2-styrylchromones 3a-h regioselectively. Due to the low reactivity of the substrates and the highly unstable character of the formed epoxides, reactions should be interrupted at lower conversions to obtain acceptable yields, especially when hydrogen peroxide is used.

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## Abstract For Abstract see ChemInform Abstract in Full Text.

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