Synthesis, Structure, and Fluorescence of Isomeric Indolizinediones. Carbonyl-Bridged Isodipyrrinones
作者:Stefan E. Boiadjiev、David A. Lightner
DOI:10.1007/s00706-004-0247-x
日期:2005.4
In "one-pot" reactions, pyrrole-alpha- and beta-aldehydes condense readily with 4-ethyl-3-methyl-3-pyrrolin-2-one to give isodipyrrinone analogs, which undergo intramolecular cyclization when the pyrrolealdehyde possesses an alpha or beta-CO2R group. The resulting regioisomeric pyrroloindolizinediones, with structures confirmed by NMR analysis, exhibit strong fluorescence, with quantum yields (phi(F)) as high as 0.91 at lambda(em) similar to 450-550 nm.