(S)-AMPA (11) is an isoxazole containing α-amino acid used for selectively labeling the homonymous excitatory amino acid (EAA) receptor. Until now only enzymatic methods have been devised for its preparation. An asymmetric synthesis of (S)-AMPA is reported which exploits the formation of 3-bromo-4-hydroxymethyl-5-methylisoxazole intermediate 3 in a potassium fluoride promoted 1,3-dipolar cycloaddition and the application of the bislactim ether methodology for introducing the chiral α-amino acid center.
(S)-
AMPA(11)是一种含有δ-
氨基酸的
异噁唑,用于选择性标记同名兴奋性
氨基酸(E
AA)受体。迄今为止,只有酶法可以制备这种物质。本报告介绍了一种 (S)-
AMPA 的不对称合成方法,该方法利用
氟化
钾促进的 1,3-二极环化反应中形成的 3-溴-4-羟甲基-
5-甲基异噁唑中间体 3,并应用双内酯醚法引入手性 δ-
氨基酸中心。