The present invention relates to synthetic routes to prepare a compound of the formula (A); wherein R
这项发明涉及合成路线,用于制备化合物(A)的公式;其中 R
Amino Acid Derivatives with Anticonvulsant Activity.
作者:Ryszard PARUSZEWSKI、Marzanna STRUPINSKA、James P. STABLES、Mariusz ŚWIADER、Stanislaw CZUCZWAR、Zdzislaw KLEINROK、Waldemar TURSKI
DOI:10.1248/cpb.49.629
日期:——
A series of benzylamides of N-alkylated, N-acylated or free nine cyclic and one linear amino acids as potential anticonvulsants have been synthesized. The structures of the obtained compounds were designed on the basis of the previously determined structure and physicochemical properties/anticvonvulsant activity relationship of the formerly synthesized compounds of this type. The obtained compounds were evaluated in mice after intraperitoneal (ip) administration, by maximal electroshock seizure test (MES test), subcutaneous (sc) pentylenetetrazol test (sc PTZ test) and by the rotarod neurotoxicity test (Tox test). The results were the basis for their classification into one of three classes of the Anticonvulsant Screening Project (ASP) of the Antiepileptic Drug Development Program (ADDP) of the NIH. Three selected compounds were tested quantitatively in rats after oral administration. The MES ED50, sc PTZ ED50, Tox TD50 were determined and their protective index (PI) values were calculated. Anticonvulsant activity of the most promising compound (15) was examined in different seizure models. The respective ED50 and PI values of this compound were as follows: against bicuculline, 73 and 1.4; against PTZ, 47 and 2.2; against strychnine, 73 and 1.4; against pilocarpine 156, and 0.7; against kainic acid (2-carboxy-4-isopropenyl-3-pyrrolidineacetic acid), 39 and 2.6; against AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid), 10 and 10.3 and against NMDA (N-methyl-D-Aspartic acid), 114 and 0.9.
一系列N-烷基化、N-酰基化或自由的九环和一个直链氨基酸的苄胺衍生物作为潜在的抗癫痫药物已被合成。所得化合物的结构设计基于先前确定的结构和物理化学性质/抗癫痫活性关系,这是根据以前合成的这类化合物而设计的。通过腹腔注射(ip)给药后的小鼠,通过最大电惊厥发作测试(MES测试)、皮下(sc)戊四氮测试(sc PTZ测试)以及通过旋转棒神经毒性测试(Tox测试)对所得化合物进行评估。结果是根据它们在国家卫生研究院(NIH)的抗癫痫药物开发计划(ADDP)中的抗癫痫筛查项目(ASP)中的分类,分为三种类别之一。选取的三种化合物在口服给药后的大鼠中进行了定量测试。确定了MES ED50、sc PTZ ED50、Tox TD50并计算了它们的保护指数(PI)值。最有希望的化合物(15)在不同癫痫模型中的抗癫痫活性被检查。该化合物的相应ED50和PI值如下:对抗苯二氯酮,73和1.4;对抗戊四氮,47和2.2;对抗士的宁,73和1.4;对抗毛果芸香碱,156和0.7;对抗海人藻酸(2-羧基-4-异丙烯基-3-吡咯烷乙酸),39和2.6;对抗AMPA(α-氨基-3-羟基-5-甲基-4-异噁唑丙酸),10和10.3;对抗NMDA(N-甲基-D-天冬氨酸),114和0.9。
Unambiguous structural characterization of hydantoin reaction products using 2D HMBC NMR spectroscopy
作者:Mary M. Senior、Tze-Ming Chan、Guoqing Li、Ying Huang、Andrew Stamford
DOI:10.1002/mrc.1956
日期:2007.3
isocyanates or thioisocyanates. The reaction has the potential to produce compounds that would have very similar one–dimensional proton (1H) or carbon–13 (13C) NMR spectra. Careful analysis of 1H1H COSY, 1H1H NOESY, and HMBC data, including chemical shifts and coupling constants, were used to distinguish correctly between carbamoyl‐2‐pyrrolidinone, hydantoin, and perhydro‐1,3‐diazepine‐2,4‐dione type
二维 (2D) NMR 实验数据用于鉴定焦谷氨酸盐与异氰酸酯或硫代异氰酸酯开环产生的反应产物。该反应有可能产生具有非常相似的一维质子 (1H) 或碳 13 (13C) NMR 光谱的化合物。仔细分析 1H1H COSY、1H1H NOESY 和 HMBC 数据,包括化学位移和耦合常数,用于正确区分氨基甲酰-2-吡咯烷酮、乙内酰脲和全氢-1,3-二氮杂-2,4 -二酮型结构可能由此反应产生。这项工作描述了它们的制备和随后使用 2D NMR 光谱的鉴定,并包括反应产物的完整 13C 分配。此处描述的 2D 核磁共振技术和分析可以成功应用于其他有可能产生异构产品的合成反应。版权所有 © 2007 John Wiley & Sons, Ltd.