作者:Alexandre Ivachtchenko、Sergiy Kovalenko、Oleksandr Drushlyak
DOI:10.1515/hc.2002.8.3.233
日期:2002.1
-4-on-2-thiones 3, 4 obtained by us in an almost 100% yield by condensation of 2-carboxymethylphenylisothiocyanates 1, 2 with o-phenylenediamine (Scheme). Cyclizations of compounds 3, 4 were carried out in a mixture of 80% N,Ndimethylformamide and 20% acetic acid under reflux for 3 hours. Quite unexpectedly, instead of the anticipated benzimidazo[l,2-£]quinazoline-4(l//)-ones 5, 6, benzimidazo[l,2
通过环化 3-(2aminophenyl)quinazoline-2-thioxo-4-ones 制备新的苯并咪唑 [1,2-c]quinazoline-6(5//)-thiones。这些产物的烷基化导致苯并咪唑并[1,2-c]喹唑啉的S-烷基衍生物。喹唑啉硫酮衍生物和一些包含喹唑啉硫酮片段的缩聚杂环作为生物活性物质是令人感兴趣的。例如,甲基 6-oxo3,4-dihydro-2//,6//-[ 1,3]thiazino[2,3-6]quinazoline-2-carboxylate 具有抗高血压活性,2-benzylthio-3-[2 -[4-(2-甲氧基苯基)哌嗪基]乙基]-4(3//)-quinazolinone 是一种有效的 α1-肾上腺素受体拮抗剂,具有抗高血压作用,iV-[4-(l//-imidazoll-yl)丁基]-7-异丙基-5-氧代-5//-噻唑[2,3-6]quina