作者:Lenore M. Martin、Bi-Huang Hu
DOI:10.1016/s0040-4039(99)01654-8
日期:1999.11
Three thiazole and oxazole containing amino acids were synthesized in good yields by condensation-cyclization. The active functional groups used, a C-terminal imino ester or a C-terminal aldehyde, reacted with both the amino groups and side chains of either serine or cysteine within 5 minutes at rt to form oxazolines or diasteriomeric mixtures of thiazolidines, respectively. The intermediate heterocyclic
通过缩合环化以高收率合成了三种含噻唑和恶唑的氨基酸。所用的活性官能团,即C-末端亚氨基酯或C-末端醛,在室温下于5分钟内与丝氨酸或半胱氨酸的氨基和侧链反应,分别形成恶唑啉或噻唑烷的非对映异构体混合物。然后将中间的杂环脱氢以形成更稳定的,完全芳族的环。N-保护的噻唑和含恶唑的结构单元的现成可用性促进了天然产物例如Microcin B17和其他含有2,4-连接的噻唑和恶唑环的肽衍生的天然产物的固相合成。