A Novel Protecting/Activating Strategy for β-Hydroxy Acids and Its Use in Convergent Peptide Synthesis
作者:Jan Spengler、Javier Ruíz-Rodríguez、Francesc Yraola、Miriam Royo、Manfred Winter、Klaus Burger、Fernando Albericio
DOI:10.1021/jo7025788
日期:2008.3.1
β-Hydroxy acids were reacted with hexafluoroacetone and carbodiimides to give carboxy-activated six-membered lactones in good yields. On reaction with amines, the corresponding amides were obtained. We demonstrate the following applications of this protecting/activating strategy: preparation of carboxamides in solution and on solid phase (both normal and reverse mode); recovery and reuse of the excess
β-羟基酸与六氟丙酮和碳二亚胺反应,以高收率得到羧基活化的六元内酯。与胺反应后,获得相应的酰胺。我们证明了这种保护/活化策略的以下应用:在溶液中和固相上(正向和反向模式)制备羧酰胺;固相合成中多余材料的回收和再利用;聚合固相肽合成(CSPPS),其肽段带有C端Ser或Thr,且差向异构化水平非常低(<1%,HPLC)。