Issue 9, 2011

Highly efficient and regiospecific photocyclization of 2,2′-diacyl bixanthenylidenes

Abstract

In contrast to the reversible photochemistry of the 2,2′-substituted bixanthenylidenes (1a–f), the photocyclization of 2,2′-diacyl bixanthenylidenes (1g–j) reveals an irreversible process where the initial cyclic intermediate C(E) can undergo a rapid [1,11] hydrogen shift to form stable isomer C′(E) in a degassed solution, which cannot revert to the starting compound, so giving a highly efficient and regiospecific photocyclization.

Graphical abstract: Highly efficient and regiospecific photocyclization of 2,2′-diacyl bixanthenylidenes

Supplementary files

Article information

Article type
Paper
Submitted
13 Jan 2011
Accepted
14 Feb 2011
First published
14 Feb 2011

Org. Biomol. Chem., 2011,9, 3165-3169

Highly efficient and regiospecific photocyclization of 2,2′-diacyl bixanthenylidenes

M. Mao, Q. Wu, M. Ren and Q. Song, Org. Biomol. Chem., 2011, 9, 3165 DOI: 10.1039/C1OB05072A

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