TY  - GEN
A1  - Węcławski, Marek K.
A1  - Tasior, Mariusz
A1  - Hammann, Tommy
A1  - Cywiński, Piotr J.
A1  - Gryko, Daniel T.
T1  - From π-expanded coumarins to π-expanded pentacenes
N2  - The synthesis of two novel types of π-expanded coumarins has been developed. Modified Knoevenagel bis-condensation afforded 3,9-dioxa-perylene-2,8-diones. Subsequent oxidative aromatic coupling or light driven electrocyclization reaction led to dibenzo-1,7-dioxacoronene-2,8-dione. Unparalleled synthetic simplicity, straightforward purification and superb optical properties have the potential to bring these perylene and coronene analogs towards various applications.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 280 
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-98822
ER  - 
TY  - JOUR
A1  - Weclawski, Marek K.
A1  - Meiling, Till Thomas
A1  - Leniak, Arkadiusz
A1  - Cywinski, Piotr J.
A1  - Gryko, Daniel T.
T1  - Planar, Fluorescent Push-Pull System That Comprises Benzofuran and Iminocoumarin Moieties
JF  - Organic letters
N2  - Previously unknown, vertically linked heterocycles comprised of benzofuran and iminocoumarin moieties have been synthesized directly from 1,5-dibenzoyloxyanthraquinone and arylacetonitriles via double Knoevenagel condensation followed by formal HCN elimination. The structural assembly of fully conjugated, electron-rich benzofuran and electron-deficient iminocoumarin is responsible for the strongly polarized nature of these heterocycles which translates into their polarity-sensitive fluorescence.
Y1  - 2015
U6  - https://doi.org/10.1021/acs.orglett.5b02042
SN  - 1523-7060
SN  - 1523-7052
VL  - 17
IS  - 17
SP  - 4252
EP  - 4255
PB  - American Chemical Society
CY  - Washington
ER  -