Selective functionalization at the α-methyl group of 1-substituted pyridin-2(1H)- and 4(1H)-ones (2- and 4-pyridones) can be achieved by appropriate choice of base. 发现正丁基锂可实现 1-苄基-2-和-4-吡啶酮衍生物的清洁 6(2)-甲基去质子化,而六甲基二硅肼钾 (KHMDS) 是相应 1-甲基-2 甲基去质子化的首选试剂- 和 -4-吡啶酮。去质子化在 –78 °C 下顺利进行,生成的阴离子在精确的温度控制下很容易与各种亲电子试剂(醛、酮、烷基化试剂和偶氮化合物)反应,形成有用的功能化 2- 和 4- 吡啶酮和喹嗪酮.
The present invention is concerned with substituted imidazo[1,5-a][1,2,4]triazolo[1,5-d][1,4]benzodiazepine derivatives of the following formula
wherein the definition of substituents is described in the claims. This class of compounds shows high affinity and selectivity for GABA A α5 receptor binding sites and might be useful as a cognitive enhancer or for the treatment of cognitive disorders like Alzheimer's disease.
本发明涉及以下式的取代咪唑[1,5-a][1,2,4]三唑[1,5-d][1,4]苯二氮䓬啉衍生物,其中取代基的定义在权利要求中描述。这类化合物对GABA A α5受体结合位点表现出高亲和力和选择性,可能有助于作为认知增强剂或治疗认知障碍如阿尔茨海默病的药物。
Isolation and structure determination of the first example of the azeto[2,3-c]quinolizinedione ring system
作者:Beatriz Fernandez、Mark R.J. Elsegood、Gary Fairley、Gareth J. Pritchard、Simon J. Teat、George W. Weaver
DOI:10.1016/j.tetlet.2015.07.029
日期:2015.9
3-c]quinolizinedione has been isolated during synthetic studies on the base catalyzed condensation of ethyl 6-methylpyridin-2(1H)-on-1-ylacetate with benzil. Closure of a fused four-membered azetidinone ring occurred when potassium hexamethyldisilazide was employed as the base. The structure of the product was confirmed by synchrotron X-ray crystallography. A possible mechanism for the formation of the
一个意想不到的azeto [2,3- c ^ ] quinolizinedione对乙基-6-甲基吡啶-2(1的碱催化缩合合成的研究过程中已分离ħ) -酮-1-基乙酸甲酯与苯偶酰。当六甲基二硅叠氮化钾用作碱时,稠合的四元氮杂环丁酮环发生闭合。产物的结构通过同步加速器X射线晶体学证实。考虑了产物形成的可能机制。
Adams; Schrecker, Journal of the American Chemical Society, 1949, vol. 71, p. 1186,1191
作者:Adams、Schrecker
DOI:——
日期:——
IMIDAZO BENZODIAZEPINE DERIVATIVES
申请人:F.HOFFMANN-LA ROCHE AG
公开号:EP1937688A1
公开(公告)日:2008-07-02
CYCLIC UREA- OR LACTAM-SUBSTITUTED QUINOXALINE-TYPE PIPERIDINE COMPOUNDS AND THE USES THEREOF