申请人:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
公开号:US20150094467A1
公开(公告)日:2015-04-02
The dihydroquinone derivatives of piperidine and piperazine are 7-piperazinyl and 7-piperadinyl-3,4-dihydroquinazolin-2(1H)-ones that exhibit D
2
and 5-HT
1A
receptor binding affinities, making them suitable for use as the active ingredient of pharmaceuticals for the treatment of schizophrenia. The derivatives have the general formula:
where X is carbon or nitrogen and R is a group selected from a through f having the formula:
or a pharmaceutically acceptable salt thereof. The piperazine compounds are prepared by condensing 4-bromo-2-nitro-benzonitrile with 1-Boc-piperazine (1-tert-butoxycarbonyl-piperazine) to form an intermediate that is converted to a piperazinyl-3,4-dihydroquinazolin-2(1H)-one. Subsequent reductive amination with the biarylaldehydes a through f completes the synthesis of the 7-piperadinyl-3,4-dihydroquinazolin-2(1H)-ones. The piperadinyl compounds are prepared from tert-butyl-4-(2-oxo-1,2,3,4-tetradihydroquinazolin-7-yl)piperidine-1-carboxylate, which is converted to 7-(piperidin-4-yl)-3,4-dihyroquinazolin-2(1H)-one. Subsequent reductive amination with the biarylaldehydes a through f completes the synthesis of the 7-piperidinyl-3,4-dihydroquinazolin-2(1H)-ones.
哌啶和哌嗪的二氢喹啉衍生物是7-哌嗪基和7-哌啶基-3,4-二氢喹唑啉-2(1H)-酮,具有D2和5-HT1A受体结合亲和力,适合用作治疗精神分裂症的药物的活性成分。这些衍生物的通用公式为:其中X为碳或氮,R为从a到f的选择性基团,其公式为:或其药学上可接受的盐。哌嗪类化合物是通过将4-溴-2-硝基苯腈与1-Boc-哌嗪(1-叔丁氧羰基哌嗪)缩合形成中间体,然后转化为哌嗪基-3,4-二氢喹唑啉-2(1H)-酮来制备的。随后,与双芳基醛a到f进行还原胺化反应,完成了7-哌嗪基-3,4-二氢喹唑啉-2(1H)-酮的合成。哌啶类化合物是从叔丁基-4-(2-氧代-1,2,3,4-四氢喹唑啉-7-基)哌啶-1-羧酸酯开始制备的,该化合物转化为7-(哌啶-4-基)-3,4-二氢喹唑啉-2(1H)-酮。随后,与双芳基醛a到f进行还原胺化反应,完成了7-哌啶基-3,4-二氢喹唑啉-2(1H)-酮的合成。