Potential cerebral perfusion agents. Synthesis and evaluation of new radioiodinated barbituric acid analogs
作者:Prem C. Srivastava、Clarence E. Guyer、Furn F. Knapp
DOI:10.1002/jhet.5570200446
日期:1983.7
provide diethyl 2-ethyl-2-(m-iodophenyl)malonate (10). The malonic ester derivative 10 was condensed with urea in the presence of sodium hydride to give the desired 5-ethyl-5-(m-iodophenyl)barbituric acid (7), and a decarbethoxylation product, 2-(m-iodophenyl)butyric acid (11). Iodine-125-labeled 4 and 7 were synthesized in the same manner and the tissue distribution of these new agents evaluated in rats
两个新的125 I-标记的巴比妥酸类似物,5-乙基-5-(É -1-碘-1-戊烯-5-基)-2-硫代巴比妥酸(4)和5-乙基-5-(米碘苯基)已经制备了巴比妥酸(7)并在大鼠中评估了其作为潜在的脑灌注剂的能力。在乙醇钠存在下用硫脲将2-乙基-2-(E -1-碘-1-戊-1-戊烯基5-戊基)丙二酸酯(3)环合,得到5-乙基-5-(E -1-碘代- 1-戊烯-5-y1)-硫代巴比妥酸(4)。(III)三氟乙酸盐,然后加入水碘化钾二2-乙基-2-苯基-丙二酸二乙酯用铊处理,以提供二2-乙基-2-(米-碘代苯基)丙二酸酯(10)。衍生物丙二酸酯10在氢化钠的存在下,得到所需的5-乙基-5-(与脲缩合米碘苯基)巴比土酸(7),和一个decarbethoxylation产物,2-(米碘苯基)丁酸(11)。碘125标记的4和7的合成方法相同,并评估了这些新药在大鼠中的组织分布。[ 125 I] 4和[ 125