SDS of cas: 2199-44-2. 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 Synthesis of cyanopyrroles.
Regioselective synthesis of α-cyanopyrroles (vs. α-alkoxycarbonylpyrroles) using oximinocyanoacetate esters in a Knorr-type reductive condensation with β-diketones can be directed by the presence of water. Thus, HON:C(CN)CO2Me was reacted with CH2Ac2 in hot AcOH in the presence of Zn dust to give exclusively 3,5-dimethylpyrrole-2-carbonitrile when the AcOH was wet. Whereas, in glacial AcOH, only Me 3,5-dimethylpyrrole-2-carboxylate was isolated in ∼40% yield.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com