Zhang, Yi; Ma, Jin Shi published the article 《Synthesis of novel tetrapyrroles and their zinc complexes》. Keywords: tetrapyrrole preparation complexation zinc; zinc tetrapyrrole complex preparation.They researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).Reference of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:2199-44-2) here.
2,2′-Tetramethyl-5,5′-bis(ethoxycarbonyl)-3,3′-dipyrromethane, prepared from 3,5-dimethyl-2-ethoxycarbonyl-1H-pyrrole and paraformaldehyde, was converted to the dicarboxylic acid and subsequently to the dialdehyde which was reacted with tert-butoxy 4-ethyl-3,5-dimethylpyrazole-2-carboxylate/3,4-diethyl-5-methylpyrazole-2-carboxylic acid/3,5-dimethyl-4-methoxycarbonylethylpyrrole-2-carboxylic acid to give I.2HBr (R = Me, R1 = Et or R = R1 = Et or R = Me, R1 = CH2CH2COOMe). I (R = Me, R1 = Et or CH2CH2COOMe) (HL) reacted with Zn(OAc)2 to give ZnL2.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com