Angewandte Chemie International Edition
10.1002/anie.201808665
COMMUNICATION
authors cordially thank M. Sc. Tobias Wilcke (Heinrich-Heine-
Universität Düsseldorf) for taking the photographs for this article.
Keywords: alkynylation • catalysis • cross-coupling •
fluorescence • multicomponent reaction
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Figure 3. Effect of rigidification in 3a,s-u on the quantum yields in CH Cl
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UV lamp (c(3) = 10 M, exc = 365 nm).
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Figure 4. Normalized solid state emission spectra of 2-aminopyridinium salts
3
a-Cl, 3a-PF
6
, 3a-BF
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, 3d-Cl, 3n-Cl, 3t-Cl and 3t-PF
6
(recorded at T = 293 K,
1
exc = 365 nm. Inset: solid state emission of 3a-PF under a handheld UV lamp
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A
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21] Crystallographic data (excluding structure factors) for the structure
reported in this paper have been deposited with the Cambridge
Crystallographic Data Centre as supplementary publication no. CCDC-
Acknowledgements ((optional))
6
1852295 3t-PF . Copies of the data can be obtained free of charge on
application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (Fax: +
44-1223/336-033; E-mail: deposit@ccdc.cam.ac.uk).
The authors gratefully acknowledge German Academic
Exchange Service (DAAD) and “Dmitrij Mendeleev” joint
scholarship program of Saint Petersburg State University (O.B.),
Deutsche Forschungsgemeinschaft (Mu 1088/9-1), and the
Fonds der Chemischen Industrie for financial support. The
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