Photochemical Transformation of some 3-benzyloxy-2-(benzo (b) thiophen-2-yl)-4 H chromen-4-ones: A Remote Substituent Effect

Abstract: The effect on photochemical transformations of the substituents present remotely from the reaction site in 3-benzyloxy-2-(benzo[b]thiophen-2-yl)-4H-chromen-4-ones has been determined. The structure (s) of the substrates and photoproducts were established by spectroscopic techniques (UV, IR, and NMR). The substituents had profound effects on product yield and distribution. Electron withdrawing groups (EWGs) on the benzenoid moiety of the chromenone nucleus increased the yield of the photoproducts whereas electron donating groups (EDGs) decreased the yield. These results may be attributed to “state switching” of the substituents during excitation.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Photochemical Transformation of some 3-benzyloxy-2-(benzo (b) thiophen-2-yl)-4 H chromen-4-ones: A Remote Substituent Effect ; volume:16 ; number:1 ; year:2018 ; pages:79-86 ; extent:8
Open chemistry ; 16, Heft 1 (2018), 79-86 (gesamt 8)

Urheber
Dalal, Aarti
Khanna, Radhika
Kamboj, Ramesh C.

DOI
10.1515/chem-2018-0009
URN
urn:nbn:de:101:1-2410161556008.126159397648
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:37 MESZ

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Beteiligte

  • Dalal, Aarti
  • Khanna, Radhika
  • Kamboj, Ramesh C.

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