Category: thiazolidine. 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. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Separation of carbethoxymethylpyrroles by thin-layer chromatography.
Carbethoxymethylpyrroles were separated by thin-layer chromatog. with ether-n-C6H14-2% AcOH on silica gel G. Et methylpyrrole-3-carboxylates (I, R = 2-Me, 4-Me) were separated from Et methylpyrrole-2-carboxylates (II, R = 3-Me, 5-Me) but separation of individual I (Rf = 54) and II (Rf = 70) was impossible. Et dimethylpyrrole-3-carboxylates (III, R = 4-Me, 5-Me) were separated from Et dimethylpyrrole-2-carboxylates (IV, R,R1 = 4,5-Me2, 3,5-Me2, 3,4-Me2). Individual IV were not separable (Rf = 70) but III were (Rf = 62, 54). Et trimethylpyrrole-2-carboxyl-ate (Rf = 70) was separated from Et trimethylpyrrole-3-carboxylate (Rf = 62).
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com