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.
改进的合成方案通过双环二肽内酰胺2将d-alduronolactone转化为带有Boc-或Fmoc-保护基的吡啶酮二肽5或6。5经区域选择性溴化得到二肽10,进一步通过钯催化的交叉偶联反应实现多样化。这种对共用肽前体的后期多样化,使尽可能多的刚性二肽发色团得以被利用。二肽11、12和13展示了一种通用策略,即作为化学生物学工具的构象锁定肽发色团的合成方法。