Liang, Shuang published the artcileHigh-performance chiral stationary phases based on chitosan derivatives with a branched-chain alkyl urea, Recommanded Product: Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide, the publication is Analytica Chimica Acta (2017), 183-193, database is CAplus and MEDLINE.
Two series of chitosan 3,6-bis(arylcarbamate)-2-(isobutylurea)s and corresponding coated-type chiral stationary phases (CSPs) were prepared from two kinds of chitosans with different mol. weights Most of the prepared CSPs demonstrated better enantioseparation performance than the homemade CSP of cellulose tris(3,5-dimethylphenylcarbamate). The CSPs of chitosan 3,6-bis(4-methylphenylcarbamate)-2-(isobutylurea) with higher mol. weight and chitosan 3,6-bis(3-chloro-4-methylphenylcarbamate)-2-(isobutylurea) with lower mol. weight possessed outstanding chiral recognition abilities which were at least as good as that of the commercialized CSP of Chiralcel OD-H towards the tested chiral analytes. Except for the two CSPs derived from chitosan 3,6-bis(4-methylphenylcarbamate)-2-(isobutylurea)s, the CSPs (the 1st class) with the chiral selectors of lower mol. weight provided better enantioseparations than the ones (the 2nd class) with the chiral selectors of higher mol. weight However, the chiral selectors of the 1st class CSPs showed higher swelling capacities in organic solvents than the ones of the 2nd class. All prepared CSPs could be analyzed with a wider range of mobile phases, in which some unusual organic solvents such as Et acetate, chloroform and THF etc. could be used as additives. According to separation performance and tolerance against organic solvents, the chitosan derivatives with branched-chain alkyl urea at 2-C of glucosamine residue were preferable to be used as chiral selectors for enantiomeric separation
Analytica Chimica Acta published new progress about 161796-78-7. 161796-78-7 belongs to imidazoles-derivatives, auxiliary class Membrane Transporter/Ion Channel,Proton Pump, name is Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide, and the molecular formula is C17H18N3NaO3S, Recommanded Product: Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem