Synthesis and Single Cell Pharmacology of Potential Heterocyclic Bioisosteres of the Excitatory Amino Acid Antagonist Glutamic Acid Diethyl Ester.
作者:Ulf Madsen、Elsebet Ø. Nielsen、David R. Curtis、David T. Beattie、Povl Krogsgaard-Larsen、Knut Maartmann-Moe、Svante Wold
DOI:10.3891/acta.chem.scand.44-0096
日期:——
2-amino-3-(3-ethoxy-5-methylisoxazol-4-yl)propionate (16) and closely related analogues were synthesized. Compound 7, a diethyl derivative of the naturally occurring excitatory amino acid ibotenic acid (IBO), was synthesized from 3-hydroxy-5-methylisoxazole (1) via 3-ethoxyisoxazol-5-ylacetic acid (5) and its ethyl ester. Nitrosation of this ester followed by catalytic reduction gave 7. The ethyl ester of IBO, 9
已经合成了一系列谷氨酸二乙酯(GDEE)的杂环类似物,后者是中央兴奋性氨基酸受体的拮抗剂,并进行了生物学测试。(RS)-乙基α-氨基-α-(3-乙氧基异恶唑-5-基)乙酸酯(7),(RS)-乙基2-氨基-3-(3-乙氧基-5-甲基异恶唑-4-基)丙酸酯(16)和密切相关的类似物被合成。化合物7是天然存在的兴奋性氨基酸ibotenic酸(IBO)的二乙基衍生物,它是由3-羟基-5-甲基异恶唑(1)通过3-乙氧基异恶唑-5-基乙酸(5)及其乙酯合成的。将该酯亚硝化,然后催化还原,得到7。IBO的9的乙酯以类似方式由3-苄氧基异恶唑-5-基乙酸(8)合成。合成的兴奋性氨基酸2-氨基-3-(3-羟基-5-甲基异恶唑-4-基)丙酸(AMPA)的乙基衍生物是由3-羟基-4,5-二甲基异恶唑(10)通过二乙基乙酰氨基丙二酸酯衍生物,经脱保护后可得到AMPA的3-乙氧基衍生物(15)。酯化15得到二乙基衍