Synthesis of homochiral amino acid pyrazine and pyrrole analogues of glutamate antagonists
作者:Andrew Dinsmore、Paul M. Doyle、Matthias Steger、Douglas W. Young
DOI:10.1039/b110979k
日期:2002.2.22
Use of the acid 7 and the aldehydes 23a and 23b in “ring switching” reactions with hydrazines has given β-(1-aminopyrrole)amino acids as kinetic products. The products from the reaction of the aldehyde have been converted into β-(pyrazine)amino acids by an equilibration–dehydration sequence. A variety of homochiral reduced heterocyclic amino acids containing two chiral centres has been prepared in this way. Some of the product amino acids undergo “reverse ring switching” to the corresponding pyroglutamic acid derivatives.
使用酸7和醛23a及23b与酰肼进行“环切换”反应,得到的动力学产物为β-(1-氨基吡咯)氨基酸。由醛反应得到的产物通过平衡-脱水序列被转化为β-(吡嗪)氨基酸。通过这种方法制备了一系列含有两个手性中心的同手性还原杂环氨基酸。部分产物氨基酸可发生“反向环切换”,生成相应的焦谷氨酸衍生物。