Synthesis and Diversification of Pyridone Dipeptide Chromophores
作者:Armin Geyer、Harald Seger
DOI:10.1055/s-2006-942546
日期:——
An improved synthetic protocol transforms d-alduronolactone via a bicyclic dipeptide lactam 2 into pyridone dipeptides with either Boc- or Fmoc-protecting groups 5 or 6. Regioselective bromination of 5 yields dipeptide 10 which is further diversified in Pd-catalyzed cross coupling reactions. This late diversification of a common peptide precursor makes a maximum number of rigid dipeptide chromophores accessible. The dipeptides 11, 12, and 13 exemplify a general strategy of accessing conformationally locked peptide chromophores as tools for chemical biology.