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Regio- and stereospecific [2+2] photocyclodimerization of a crown-contain butadienyl dye via cation-induced self-assembly in solution

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Abstract

Self-assembled pseudocyclic structures consisting of two molecules of a crown-containing butadienyl dye and two Mg2+ ions readily undergo regio- and stereospecific [2+2] photocycloaddition in MeCN to produce a single cyclobutane stereoisomer in almost quantitative yield.

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  33. The signals from cyclobutane protons H(c) and H(d) are overlapped by an intense signal from the protons of CH2O groups.

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Correspondence to Evgeny N. Ushakov or Sergey P. Gromov.

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† Electronic supplementary information (ESI) available: Absorption spec-troscopy data for a cationic analogue of dye 5; global analysis of spectrophotometric titration data (factor analysis, discussion on com-plexation stoichiometry, parameterized modelling of absorption spectra); molecular mechanics and DFT modelling of dimers (5⊙Mg2+)2. See DOI: 10.1039/c0pp00227e

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Ushakov, E.N., Vedernikov, A.I., Alfimov, M.V. et al. Regio- and stereospecific [2+2] photocyclodimerization of a crown-contain butadienyl dye via cation-induced self-assembly in solution. Photochem Photobiol Sci 10, 15–18 (2011). https://doi.org/10.1039/c0pp00227e

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  • DOI: https://doi.org/10.1039/c0pp00227e

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