Synfacts 2009(12): 1344-1344  
DOI: 10.1055/s-0029-1218184
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart ˙ New York

A New Record for Negative Solvatochromism

Contributor(s): Timothy M. Swager, Jan M. Schnorr
I. Bolz, D. Schaarschmidt, T. Rüffer, H. Lang, S. Spange*
Technische Universität Chemnitz, Germany
Further Information

Publication History

Publication Date:
20 November 2009 (online)


The authors report the synthesis and properties of a pyridinium-barbiturate-betaine dye (3). After reacting diethylphenyl malonate and N-methyl urea they perform a nitration leading to 2. The following reaction with potassium formate followed by 2,4,6-triphenylpyrilium tetrafluoroborate yields the desired dye 3.