Synthesis and Biological Activity of (S)-2-Amino-3(2,5-dihydro-5-oxo-4-isoxazolyl)propanoic Acid (TAN-950 A) Derivatives.
作者:Norikazu TAMURA、Yoshihiro MATSUSHITA、Toshi IWAMA、Setsuo HARADA、Shoji KISHIMOTO、Katsumi ITOH
DOI:10.1248/cpb.39.1199
日期:——
starting with methyl (S)- and (R)-N-Boc-pyroglutamate (8) via acylation at the C-4 position followed by isoxazolone formation with hydroxylamine and subsequent deprotection reactions. The lactam 16, prepared from (RS)-aminoadipic acid, and dimethyl esters 19 of (R)- and (S)-aspartic acid were converted to (RS)-3-methyl-homo-TAN-950 A (15i) and optically active nor-TAN-950 A derivatives 15j--o, respectively
(S)-2-氨基-3-(2,5-二氢-5-氧代-4-异恶唑基)丙酸(TAN-950 A(1))是一种新型氨基酸抗生素,对谷氨酸受体具有高亲和力中枢神经系统。为了提高对谷氨酸受体的亲和力,研究了TAN-950 A衍生物6a-o,15a-o的构效关系。以(S)-和(R)-N-Boc-焦谷氨酸甲酯(8)为起始原料,通过C-4位的酰化反应合成旋光性TAN-950 A类似物15a-h,然后与羟胺形成异恶唑酮并随后脱保护反应。将由(RS)-氨基己二酸和(R)-和(S)-天冬氨酸的二甲酯19制备的内酰胺16转化为(RS)-3-甲基-homo-TAN-950 A(15i)和利用相似的反应序列分别对光学活性的nor-TAN-950 A衍生物15j-o进行了研究。大多数TAN-950 A衍生物6a-o,15a-o对谷氨酸受体具有亲和力。3-烷基衍生物15b,d-g特别显示出对喹喹啉亚型受体的高亲和力,并对海马