Cyclocondensation of 3-amino-2-iminonaphtho[1,2-<i>d</i>]-thiazole with<i>α</i>-ketocarboxylic acid derivatives: Synthesis of 2-substituted 3-Oxo-3<i>H</i>-naphtho[1′,2′:4,5]thiazolo-[3,2-<i>b</i>][1,2,4]triazines as potential anti-HIV agents
作者:Kang-Chien Liu、Bi-Jane Shih、Chuen-Hsiang Lee
DOI:10.1002/jhet.5570290116
日期:1992.1
cyclocondensation of 3-amino-2-iminonaphtho[1,2-d]thiazole (1) with a series of α-keto mono- and dicarboxylic acid derivatives 5a-i under different conditions was investigated. When the experiments were performed by refluxing in glacial acetic acid, the corresponding cyclized products, 2-substituted 3-oxo-3H-naphtho[1′,2′:4,5]thiazolo[3,2-b][1,2,4]triazines 4 were obtained in fair to good yields. On the
研究了3-氨基-2-亚氨基萘并[1,2- d ]噻唑(1)在不同条件下与一系列α-酮一元和二元羧酸衍生物5a-i的环缩合反应。通过在冰醋酸中回流进行实验时,相应的环化产物2-取代的3-oxo-3 H-萘[1',2':4,5]噻唑并[3,2- b ] [1, 2,4]三嗪4以公平至良好的产率获得。在另一方面,当反应在沸腾的乙醇中进行的,它给了只开链凝聚6,或在少数情况下,用少量一起4。自中间体6由于存在E-异构体和Z-异构体的混合物,因此加热引起的环化作用不充分。无论如何,已经评估了代表性化合物4b,g,i的抗HIV活性,但是它们都不具有活性。