139930-99-7

Upstream product

• 19711-75-2 5-bromo-3,4-dimethyl-pyrrole-2-carboxaldehyde 
• 139931-09-2 C₁₇H₂₁ClN₂O₄ 
• 250216-08-1 (E)-3-(5-Bromo-3,4-dimethyl-1H-pyrrol-2-yl)-2-cyano-acrylic acid methyl ester 
• 250216-07-0 5-((E)-2-Cyano-2-methoxycarbonyl-vinyl)-3,4-dimethyl-1H-pyrrole-2-carboxylic acid 
• 59435-08-4 benzyl 5-formyl-3,4-dimethylpyrrole-2-carboxylate 
• 59435-09-5 5-(2-cyano-2-methoxycarbonyl-vinyl)-3,4-dimethyl-pyrrole-2-carboxylic acid benzyl ester 
• 4424-76-4 2-((benzyloxy)carbonyl)-3,4,5-trimethylpyrrole 
• 157917-25-4 tert-butyl 5-<(E)-2-cyano-2-(methoxycarbonyl)vinyl>-3,4-dimethylpyrrole-2-carboxylate 
• 157917-26-5 5-<(E)-2-cyano-2-(methoxycarbonyl)ethenyl>-3,4-dimethylpyrrole-2-carboxylic acid 
• 157917-27-6 2-bromo-5-<(E)-2-cyano-2-(methoxycarbonyl)vinyl>-3,4-dimethylpyrrole 
• 59435-12-0 5-Formyl-3,4-dimethyl-2-pyrrolcarbonsaeure-tert-butylester 

Relevant academic research and scientific papers

New Synthesis of Biliverdins, Corroles and Azaporphyrins from 1,19-Dibromo-ac-biladiene Salts

Treatment of the readily available, 1,19-dibromo-ac-biladiene dihydrobromide salts 3 with dimethyl sulfoxide (DMSO) in presence of a catalytic amount of toluene-p-sulfonic acid affords symmetrical and unsymmetrical biliverdins 4 in excellent yield; unsymm

Stepwise Synthesis of 1,19-Dibromo-a,c-biladienes and Their Conversion into Biliverdins, Corroles and Azaporphyrins

The first stepwise syntheses of unsymmetrically substituted 1,19-dibromo-a,c-biladienes, e.g. 3c, via the so-called 'tripyrrene route', and their facile conversion into biliverdins (bilin-1,19-diones), e.g. 4c, are described; this methodology is also adap