A New Procedure for the Preparation of Bilirubin IIIα from Bilirubin IXα
作者:Manel Fontich、Meritxell Rodríguez、Francesc R. Trull
DOI:10.1080/00397919408020775
日期:1994.4
Abstract A procedure for the preparation of bilirubinIIIα with an overall 15% yield from the natural, unsymmetric bilirubinIXα is described which does not require hplc separation at any stage. The process involves: 1) quantitative, acid-catalyzed addition of ethanethiol to the exo vinyl group of bilirubinIXα to give the bilirubinIXα thioether adduct 1; 2) acid-catalyzed constitutional isomerization
A Generalized Method for Synthesizing Unsymmetric from Symmetric Bile Pigments
作者:Francesc R. Trull、Meritxell Rodríguez、David A. Lightner
DOI:10.1080/00397919308013808
日期:1993.11
Abstract Two general rules are proposed for synthesizing unsymmetric from symmetric bilepigments based on a “reverse scrambling” strategy and polarity/acid-base properties of reactants and products, to facilitate separation of the target unsymmetrical bilirubin, such as mesobilirubin-VIIIα and others. By this method 17-desvinyl-17-ethyl-bilirubin-VIIIα, mesobilirubin-VIIIα, 12-despropionic acid-1