Regioselective Friedel–Crafts acylation of 2,3,4,5-tetrahydro-1H-2-benzazepine and related nitrogen heterocycles
摘要:
It is revealed that NH-protected 2,3,4,5-tetrahydro-1H-2-benzazepine 4 is acylated on C-8 with greater than 95% regioselectivity. This regioselectivity has been applied to the synthesis of 3-(1-benzylpiperidin-4-yl)-1-(2,3,4,5-tetrahydro-1H-2-benzazepin-8-yl)propan-1-one 3a, an inhibitor of acetylcholinesterase (AChE). The regioselectivities of the acylation of the following nitrogen heterocycles have also been studied: 4-formyl-2,3,4,5-tetrahydro-1,4-benzoxazepine 6, 2,3,4,5-tetrahydro-1H-2-benzazepin-3-one 7, 2,3,4,5-tetrahydro-1H-3-benzazepin-2-one 8, 7,11b,12,13-tetrahydro-5H-isoindolo[2,1-b][2] benzazepin-7-one 9 and 6,7,9,13b-tetrahydro-5H-isoindolo[1,2-a][2]benzazepin-9-one 10. A molecular orbital (MO) calculation on the Lewis acid coordinated substrates has been used for predicting regioselectivity.
Tetracyclic condensed heterocyclic compounds and their use
申请人:Takeda Chemical Industries, Ltd.
公开号:US05620973A1
公开(公告)日:1997-04-15
A novel compound of the formula ##STR1## wherein Ar represents a tetracyclic fused heterocyclic group which may be substituted; R.sup.1 represents H or a hydrocarbon group which may be substituted; Y represents an amino or nitrogen-containing saturated heterocyclic group which may be substituted, its salt, inhibiting excellent cholinesterase inhibitory activity and monoamine uptake inhibitory activity, thus being useful as therapeutic and/or prophylactic medicaments of senile dementia.
Tetracyclic condensed heterocyclic compounds for the treatment of senile dementia
申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:EP0655451A1
公开(公告)日:1995-05-31
A novel compound of the formula
wherein Ar represents a tetracyclic fused heterocyclic group which may be substituted; R¹ represents H or a hydrocarbon group which may be substituted; Y represents an amino or nitrogen-containing saturated heterocyclic group which may be substituted, its salt, inhibiting excellent cholinesterase inhibitory activity and monoamine uptake inhibitory activity, thus being useful as therapeutic and/or prophylactic medicaments of senile dementia.
一种新颖的式化合物
其中 Ar 代表可被取代的四环融合杂环基团;R¹ 代表 H 或可被取代的烃基团;Y 代表可被取代的氨基或含氮饱和杂环基团,其盐具有优异的胆碱酯酶抑制活性和单胺摄取抑制活性,因此可用作老年痴呆症的治疗和/或预防药物。