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.Angelini, Giancarlo; Sleiter, Giancarlo researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).SDS of cas: 2199-44-2.They published the article 《Selective β-chlorination of 1-benzoyl-2-ethoxycarbonyl-3,5-dimethylpyrrole with iodobenzene dichloride. Preparation of ethyl 4-chloro-3,5-dimethylpyrrole-2-carboxylate》 about this compound( cas:2199-44-2 ) in Gazzetta Chimica Italiana. Keywords: chlorination dimethylpyrrolecarboxylate; pyrrolecarboxylate dimethyl ester chlorination; chlorodimethylpyrrolecarboxylate ester. We’ll tell you more about this compound (cas:2199-44-2).
Chlorination of I (R = H, R1 = Bz) with PhI+ClCl- in CHCl3 at -15° in the dark, followed by debenzoylation of the product gave I (R = Cl, R1 = H). Reaction of I ( R = R1 = H) with Cl, SO2Cl2, or PhI+ClCl- in CHCl3 or ether at low temperature resulted in simultaneous chlorination of both the β-position and the α-methyl group.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com