Proton NMR spectra and structures of some bicyclic compounds oriented in nematic phases was written by Diehl, P.;Zimmermann, H.. And the article was included in Organic Magnetic Resonance in 1976.Product Details of 322-46-3 This article mentions the following:
The PMR spectra of 1,4,5-triazanaphthalene, benzothiazole, and quinoline, oriented in nematic liquid crystalline phases, were analyzed and the parameters used to determine interproton distance ratios. The symmetry of the benzene ring was violated when compared to the nonhetero analogs. In the experiment, the researchers used many compounds, for example, Pyrido[2,3-b]pyrazine (cas: 322-46-3Product Details of 322-46-3).
Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazine heterocycles and their benzo derivatives possess many interesting properties, including chemical reactivity profiles, and have diverse applications in total synthesis, medicine, chemical biology, materials, dyes, and imaging. Pyrazine and a variety of alkylpyrazines are flavor and aroma compounds found in baked and roasted goods. Tetramethylpyrazine (also known as ligustrazine) is reported to scavenge superoxide anion and decrease nitric oxide production in human Granulocytes.Product Details of 322-46-3