Synthesis of the Tripeptide Domain of Sanglifehrins Using Asymmetric Phase-Transfer Catalysis
作者:James D. White、Khomson Suttisintong
DOI:10.1021/jo3027214
日期:2013.3.15
synthesized from the constituent amino acid residues in nine steps and 42% overall yield. A key construction was the installation of (S) absolute configuration in m-hydroxyphenylalanine using asymmetric phase-transfer catalysis in the presence of N-(1-naphthyl)cinchonidinium bromide. Cbz-protected (S)-valine was first coupled to the amino group of (S)-m-triisopropylsilyloxyphenylalanine tert-butyl ester,
三肽(小号)-valinyl-(小号) -米-hydroxyphenylalanyl-(3小号)-piperazate共同免疫抑制剂萨菲菌素从构成氨基酸残基在九个步骤和42%的总收率合成。一个关键的结构为(安装小号)绝对构型在米-hydroxyphenylalanine使用在存在不对称相转移催化ñ - (1-萘基)金鸡尼丁溴化物。Cbz-保护的(小号) -缬氨酸首先耦合至氨基(的小号) -米-triisopropylsilyloxyphenylalanine叔-丁基酯,和在酯裂解后得到的二肽与(3S)-哌嗪酸甲酯连接。