623945-15-3Relevant academic research and scientific papers
A novel diacetylenic bilirubin
Tu, Bin,Lightner, David A.
, p. 707 - 712 (2003)
An etiobilirubin-IIβ analog with the central C(10) CH2 group replaced by a diacetylene unit (1) was synthesized by base-catalyzed condensation of bis-[3-methyl-4-ethyl-5-formylpyrrol-2-yl]-diacetylene (3) with 3-methyl-4-ethyl-5-p-toluenesulfonyl-2-pyrrolinone (10). Diacetylenic rubin 1 is a dark red solid, giving orange solutions with uv-visible absorption maxima near 460 nm.
