Low energy excited singlet states of some monophenyl substituted 5-membered heterocycles and their photoisomerization was written by Mehlhorn, A.;Fratev, F.;Monev, V.. And the article was included in Tetrahedron in 1981.Application In Synthesis of 5-Phenylthiazole This article mentions the following:
The 2 low-lying singlet excited states of 14 monophenylated 5-membered heterocycles were studied with respect to their energy level ordering, the oscillator strengths of the pertinent transitions, the state wave functions, and the 1-particle d. matrixes. Two types of lowest energy singlet states were found by configuration anal. and similarity anal. One state is characterized by delocalization over the whole π system, whereas the other is locally excited at the Ph moiety. The relation between this classification and the different photoisomerization paths of the title compounds is discussed. In the experiment, the researchers used many compounds, for example, 5-Phenylthiazole (cas: 1826-13-7Application In Synthesis of 5-Phenylthiazole).
5-Phenylthiazole (cas: 1826-13-7) belongs to thiazole derivatives. The thiazole ring has been identified as a central feature of numerous natural products, perhaps the most famous example of which is epothilone. Various laboratory methods exist for the organic synthesis of thiazoles. Prominent is the Hantzsch thiazole synthesis is a reaction between haloketones and thioamides.Application In Synthesis of 5-Phenylthiazole
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica