Structural modification of bioactive compounds. II. Syntheses of aminophosphonoic acids.
作者:KATSUHIDE MATOBA、HIROYO YONEMOTO、MASAKO FUKUI、TAKAO YAMAZAKI
DOI:10.1248/cpb.32.3918
日期:——
To develop antagonists which show selectivity in blocking neurotransmitters, several aminophosphonoic acids, 2-amino-5-phosphonopentanoic acid (IVb), 2-amino-4-(2-phosphonomethylphenyl) butyric acid (VIII), 2-(2-amino-2-carboxy) ethylphenylphosphonic acid (XIc), and N-benzylproline-4-phosphonic acid (XIX), were synthesized. Compounds IVb, VIII, and XIc were prepared from the corresponding halides (V, Xa, and XIa, respectively) by treatment with sodium diethyl acetamidomalonate (VI). Compound XIX was synthesized via 1, 3-dipolar cycloaddition of ethyl N-benzyl-N-phenylthiomethylglycinate (XV) to diethyl vinylphosphonate (XVI).
为了开发对神经递质具有选择性阻断作用的拮抗剂,合成了几种氨基膦酸,包括2-氨基-5-膦酸戊酸(IVb)、2-氨基-4-(2-膦甲基苯基)丁酸(VIII)、2-(2-氨基-2-羧基)乙基苯膦酸(XIc)和N-苄基脯氨酸-4-膦酸(XIX)。化合物IVb、VIII和XIc是通过相应的卤化物(分别为V、Xa和XIa)与二乙基乙酰胺基丙二酸钠(VI)反应制备的。化合物XIX是通过乙基N-苄基-N-苯硫甲基甘氨酸酯(XV)与二乙基乙烯基膦酸酯(XVI)的1, 3-偶极环加成反应合成的。