A novel route to 1,4-dihydroquinoxaline for biological and electrochemical properties

In this paper we describe the synthesis of new quinoxalines which can present a potential pharmacological properties The 6-methyl-1,4-dihydroquinoxaline-2,3-dione 3 was synthesized by the condensation of 4-methyl-o-phenylenediamine 1 with oxalic acid 2 under reflux in hydrochloric acid solution.Compound3 was exposed to alkylation reactions under the conditions of phase transfer catalysis using monohalogenated agents leading to alkylated products 3a-3f. Structures of the obtained products were confirmed by spectroscopic measurements

2-Methyl-3-(n-octylsulfan­yl)quinoxaline

All the non-H atoms of the title compound, C17H24N2S, lie almost in a common plane (r.m.s. deviation = 0.049 Å). The octyl chain adopts an all-trans conformation

A new way for the synthesis of pyrazolo-1,5-benzodiazepinethiones from 3,3-dimercapto(or dialkylmercapto)-1-phenyl-2-propen-l-ones

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