Synthesis of 1-aryl- and 1-alkyl-2,3-dimethylquinoxalinium perchlorates. 2. Synthesis and proton NMR spectra of 2,3-dimethyl-1-phenyl-6-X-quinoxalinium perchlorates was written by Schelz, Dieter. And the article was included in Helvetica Chimica Acta in 1978.Quality Control of Ethyl 4-chloro-3-nitrobenzoate This article mentions the following:
A general method for the preparation of the title compounds I (X = CH, R = Ph, R1 = NO2, SO2Me, CN, CF3, CO2Et, Cl, Br, Me, OMe; R = Me, 4-ClC6H4, R1 = NO2, H, X = CH; R = Ph, R1 = H, X = N) involved the condensation of 4,2-R(H2N)C6H3NHR with MeCOCOMe and HClO4 in a mixed solvent containing excess Et2O. I were converted into II by heating with Et3N and Me2CO. The NMR shifts of I were correlated with Hammet’s constant σp. I are useful as dye precursors. In the experiment, the researchers used many compounds, for example, Ethyl 4-chloro-3-nitrobenzoate (cas: 16588-16-2Quality Control of Ethyl 4-chloro-3-nitrobenzoate).
Ethyl 4-chloro-3-nitrobenzoate (cas: 16588-16-2) belongs to organic chlorides. Organic chlorides can be used in production of: PVC, pesticides, chloromethane, teflon, insulators. Alkyl chlorides are versatile building blocks in organic chemistry. While alkyl bromides and iodides are more reactive, alkyl chlorides tend to be less expensive and more readily available.Quality Control of Ethyl 4-chloro-3-nitrobenzoate
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics