Sequence-independent activation of photocycloadditions using two colours of light
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Rodrigues, Leona L
Walden, Sarah L
Blinco, James P
Unterreiner, Andreas-Neil
Barner-Kowollik, Christopher
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Abstract
We exploit two reactive chromophores to establish sequence-independent photochemical activation, employing ortho-methyl benzaldehyde (oMBA) and N,N-(dimethylamino)pyrene aryl tetrazole (APAT) with N-(2-hydroxy)ethyl maleimide (NHEM), without any additives. Critically, the order of the irradiation sequence is irrelevant, as the shorter wavelength does not activate the higher wavelength activated species. Therefore, full sequence-independent λ-orthogonality is achieved through differences in both the reaction quantum yields (Φr,oMBA and Φr,APAT) and wavelength-dependent reactivity profiles of the employed chromophores.
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Chemical Science
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13
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2
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© 2022 The Author(s). Published by the Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
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Chemical sciences
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Kamm, PW; Rodrigues, LL; Walden, SL; Blinco, JP; Unterreiner, A-N; Barner-Kowollik, C, Sequence-independent activation of photocycloadditions using two colours of light, Chemical Science, 13 (2), pp. 531-535