This method relates to the preparation of the compound of structural formula 1, where R is a hydrogen atom -H or methyl group -CH3 respectively, in reactions of 1-phenyl-2H,6H-imidazo[1,5-c]quinazoline-3,5-dione with formula 2 and oxiranes with formula 3 in form of ethylene oxide for R = -H or propylene oxide for R = CH3 respectively. In the first stage, reactions are conducted in pressurized reactor, at a molar ratio of 1-phenyl-2H,6H-imidazo[1,5-c]quinazoline-3,5-dione to oxirane equal to 1 :2, in solvent and in presence of triethylamine as catalyst, and in the second stage after the reaction is finished, catalyst and solvent are distilled off under reduced pressure, precipitated with acetone, and then the resulting compound is filtered and crystallized from ethanol. In the first step, in the case of ethylene oxide reactions are conducted at temperature of 60 ÷ 70 °C for at least 70 hours, whereas in the case of propylene oxide it is conducted at temperature of 70 ÷ 90°C for at least 90 hours. Furthermore, in the first step dimethyl sulfoxide is used as a solvent in the first step, whereas in the second step distillation of the catalyst and solvent is conducted under pressure lower than 10 mm Hg. The invention may be used as compounds having potential biological activity, starting compounds in synthesis of medicines or substrates for synthesis of other organic compounds with imidazoquinazoline ring.
该方法涉及制备结构式1的化合物,其中R分别为氢原子-H或甲基基团-
CH3,在1-苯基-2H,6H-
咪唑[1,5-c]
喹唑啉-3,5-二酮(式2)与环氧烷(式3)的反应中以乙氧基为R=-H或以丙氧基为R= 的形式进行。在第一阶段,反应在加压反应器中进行,在溶剂和
三乙胺催化剂的存在下,1-苯基-2H,6H-
咪唑[1,5-c]
喹唑啉-3,5-二酮与环氧烷的摩尔比为1:2,反应完成后,在减压下蒸馏催化剂和溶剂,用
丙酮沉淀,然后从
乙醇中过滤和结晶得到产物。在第一步中,如果是乙氧基反应,则在60-70°C的温度下进行至少70小时,而如果是丙氧基,则在70-90°C的温度下进行至少90小时。此外,在第一步中,
二甲基亚砜用作溶剂,在第二步中,催化剂和溶剂的蒸馏在低于10毫米
汞柱的压力下进行。该发明可用作具有潜在
生物活性的化合物,用于合成药物的起始化合物或用于合成其他带有
咪唑喹唑啉环的有机化合物的底物。