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.Antina, E. V.; Guseva, G. B.; Dudina, N. A.; V’yugin, A. I.; Semeikin, A. S. researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).Recommanded Product: 2199-44-2.They published the article 《Synthesis and spectral analysis of alkyl-substituted 3,3′-bis(dipyrrolylmethenes)》 about this compound( cas:2199-44-2 ) in Russian Journal of General Chemistry. Keywords: dipyrrolylmethene preparation fluorescence IR NMR; biline biladiene analog preparation mol structure property relationship; photosensitizer fluorescence photodynamic therapy dipyrrolylmethene preparation. We’ll tell you more about this compound (cas:2199-44-2).
Four new alkyl-substituted 3,3′-bis(dipyrrolylmethene) dihydrobromide derivatives containing from 4-10 alkyl substituents were synthesized. In a highly alkylated ligand among these substances one of the hydrogen atoms of the 3,3′-methylene spacer was substituted with a Ph group. The compounds obtained were studied by IR, 1H NMR, electron absorption and fluorescent spectroscopy. The increased alkylation degree of pyrroles and the introduction of an aryl substituent in the 3,3′-spacer causes a significant high-frequency shift of the N-H stretching vibrations in the IR spectra, an upfield shift of the NH-proton signals in NMR spectra, a decrease in the auxochromic effects of protons on the aromatic system of chromophore in the composition of salts. The red shift of maximum of the strong band in electron absorption spectra and the emission spectra of compounds in DMF, DMSO, C5H5N, C6H6, and CHCl3 was established. The salts obtained are stable in benzene and chloroform, while in electron-donor solvents the irreversible processes of solvolytic dissociation of salts to free organic base and HBr take place.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com