The compounds are biologically active tricyclic quinazolinones of the class of imidazo[2,1-b]quinazolin-5-ones, pyrimido[2,1-b]quinazolin-6-ones and diazepino[2,1-b]quinazolin-7-ones, useful, for example, as bronchodilator agents. Processes for preparation of said compounds include the reaction of a N-carboxy anthranilic anhydride (an isatoic anhydride) with a cyclic pseudothiourea such as 2-organomercapto-4,5-dihydroimidazole or 2-organomercapto-3,4,5,6-tetrahydropyrimidine.
这些化合物是具有
生物活性的
三环喹唑啉类化合物,属于
咪唑[2,1-b]
喹唑啉-5-酮,
嘧啶并[2,1-b]
喹唑啉-6-酮和二氮杂[2,1-b]
喹唑啉-7-
酮类,例如作为支气管扩张剂。制备这些化合物的过程包括将N-羧基
蒽醌酐(异
香草酸酐)与环状伪
硫脲反应,如2-有机
硫醇基-4,5-二氢
咪唑或2-有机
硫醇基-3,4,5,6-四氢
嘧啶。