37789-64-3Relevant articles and documents
Synthesis of orthogonally protected pyrrole tricarboxylic acid derivatives: Versatile building blocks for pyrrole-containing compounds
Schmuck, Carsten,Rupprecht, Daniel,Urban, Christian,Walden, Nicholas
, p. 89 - 96 (2007/10/03)
The large-scale synthesis of three new orthogonally protected pyrrole tricarboxylates 1-3 is described. Using different cleavage conditions, each of the three carboxylates can be set free selectively without affecting the others, making these pyrrole derivatives versatile synthetic building blocks for a wide range of applications in natural product or supramolecular chemistry. Georg Thieme Verlag Stuttgart.
Heteronuclear NOE analysis of bilirubin solution conformation and intramolecular hydrogen bonding
Doerner, Thomas,Knipp, Bernd,Lightner, David A.
, p. 2697 - 2716 (2007/10/03)
1H{1H}-Homonuclear and 13C{1H}-heteronuclear NOE (Nuclear Overhauser Effect) experiments carried out on bilirubin analogs (1-5) in CDCl3 and in CDCl3-(CD3)2SO solutions indicate that the carboxylic acid groups and dipyrrinone lactams and/or pyrroles are linked by intramolecular hydrogen bonding. Nonbonded C-H to H-C and N-H to H-N, and N-H to CO2H distances were calculated from the NOE data and confirm that the bilirubins adopt a folded, ridge-tile shape in solution.