The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ) is researched.Product Details of 2199-44-2.Sundukova, T. A.; Vasilevskii, S. F.; Shvartsberg, M. S.; Kotlyarevskii, I. L. published the article 《Acetylene condensation in a series of pyrroles》 about this compound( cas:2199-44-2 ) in Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya. Keywords: acetylene condensation pyrrolecarboxylate. Let’s learn more about this compound (cas:2199-44-2).
Condensation of Et 4-iodo-3,5-dimethylpyrrole-2-carboxylate with HCCR(R = Ph, morpholinomethyl) in Et2NH in the presence of Pd (PPh3)2Cl2 and CuI gave ethynylpyrroles I in 64 and 68% yield, resp. Similar reaction with HOCMe2CCH gave the deiodinated product in 18% yield. Treatment of II (R = I) with CuCCPh in pyridine-DMF at reflux gave 78.0% II (R = CCPh). Deiodination of III (R = I) (IV) was easier than with the 4-iodo-2-carboxylate derivative but more difficult than II (R = I). In the presence of Pd complex catalyst condensation of IV and PhCCH gave concurrent redn and substitution.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com