An efficient synthesis of dehydroamino acids and dehydropeptides from O-Cbz and O-Eoc derivatives of serine and threonine
作者:Ramapanicker Ramesh、Kavita De、Srinivasan Chandrasekaran
DOI:10.1016/j.tet.2007.07.094
日期:2007.10
simple and efficient method for the synthesis of dehydroamino acids from serine and threonine is reported. Various O-Cbz and O-Eoc derivatives of serine and threonine are prepared using CbzCl and EocCl, respectively, and are subjected to an anti-selective elimination on treatment with K2CO3 in DMF at 65 °C to afford dehydroalanine and dehydroamino butyric acid derivatives, respectively, in excellent yields
据报道,一种简单有效的从丝氨酸和苏氨酸合成脱氢氨基酸的方法。各种Ò -Cbz和ö丝氨酸-Eoc衍生物和苏氨酸分别使用CbzCl和EocCl,制备,并且经受抗-选择性消除治疗以K 2 CO 3在DMF中在65℃下,得到脱氢丙氨酸和脱氢丁酸酸衍生物,分别具有优异的收率。这些丝氨酸和苏氨酸的碳酸盐衍生物的高稳定性使得它们可以作为受保护的丝氨酸和苏氨酸残基用于正常的肽合成中。通过掺入O -Cbz或O合成的肽-Eoc衍生物在所报道的条件下容易消除,从而以极好的收率得到相应的脱氢肽。反应条件足够温和,不会引起肽中存在的其他立体异构中心的外消旋化。