3]oxazin-4-ones and thieno[1,3]thiazin-4-ones were synthesized and investigated as inhibitors of the alpha/beta hydrolases cholesterol esterase (CEase) and acetylcholinesterase (AChE). The introduction of a cycloaliphatic five- or six-membered ring fused at the thiophene was favorable for CEase inhibition. Such compounds were analyzed as true alternate substrate inhibitors. 6,7-Dihydro-2-(dimethylamino)-4H,5H-cyclopenta[4
合成了一系列
噻吩并[1,3]恶嗪-4-酮和
噻吩并[1,3]
噻嗪-4-酮,并研究了它们作为α/β
水解酶
胆固醇酯酶(CEase)和
乙酰胆碱酯酶(AChE)的
抑制剂。在
噻吩上稠合的脂环族五或六元环的引入有利于抑制CEase。这类化合物被分析为真正的替代底物
抑制剂。6,7-二氢-2-(二甲基
氨基)-4H,5H-环戊[4,5]
噻吩并[2,3-d] [1,3]恶嗪-4-酮(33)的K(i)值630 nM的样品对CEase催化降解的敏感性低。化合物33及其类似物不抑制AChE。在碱性氮原子上带有大的疏
水取代基的四氢
吡啶环的引入提供了对Chase完全无活性的AChE
抑制剂。7-苄基5,6,7,8-四氢-2-(N-3,4-二甲氧基苄基-N-甲基
氨基)-4H-
吡啶基[4',3':4,5]
噻吩并[2,3-d] [1,3]恶嗪-4-酮(21)的IC(50)抑制AChE的值为330 nM。得出了在无限
抑制剂浓度