So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Belavina, I. G.; Potashnikov, M. M. researched the compound: quinoliniumhydrogensulphate( cas:530-66-5 ).Electric Literature of C9H9NO4S.They published the article 《Separation of quinaldine from a ternary mixture with quinoline and isoquinoline》 about this compound( cas:530-66-5 ) in Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation). Keywords: quinaldine separation; quinoline quinaldine separation; isoquinoline quinaldine separation. We’ll tell you more about this compound (cas:530-66-5).
The solubility relations of the monophosphate and bisulfate salts of quinaldine (I), quinoline (II), and isoquinoline (III) were studied. The solubility of the monophosphate of III in H2O at 25° is 6.7 times that of I or II. The solubility of the bisulfates of I and II was studied at 0-50° and 75-95% EtOH. At 10° and 85% EtOH, the solubility ratio of II to I is 3.8. I, 96% pure, was obtained from a mixture of I, II, and III by the following method. To 500 g. of a 1:1 mixture I (32%), II (20%), and III (40%) in MeOH was added 1 equivalent of H3PO4 (at <25°). To the precipitated salt was added just enough H2O to dissolve all of the phosphate of III. The remaining salt was decomposed in 20% NaOH yielding a 1:1 mixture of I and II. This was dissolved in 85% EtOH (1:1 ratio) and 1 equivalent of H2SO4 was added. The precipitated salt was recrystallized from 85% EtOH at 10°, decomposed with 10% base, extracted with benzene, and distilled to yield 58.8% I. From this literature《Separation of quinaldine from a ternary mixture with quinoline and isoquinoline》,we know some information about this compound(530-66-5)Electric Literature of C9H9NO4S, but this is not all information, there are many literatures related to this compound(530-66-5).
Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com