Design, synthesis and biological activity of acyl substituted 3-amino-5-methyl-1,4,5,7-tetrahydropyrazolo[3,4-b]pyridin-6-ones as potential hypnotic drugs
摘要:
Among the known non-benzodiazepinic hypnotic drugs acting on the alpha 1 subunit of the GABA-A receptor, Zolpidem (2a), Zaleplon (1b) and Indiplon (1a) have showed high affinity and selectivity. Following a design methodology including pharmacophoric requirements and ADME-predicted properties, we have synthesized a library of 3-amino-4,5-dihydro-1H-pyrazolo[3,4-b]pyridin-6(7H)-ones (3) and their N1-alkyl derivatives (4) as new scaffolds for designing non-benzodiazepine BZ receptor ligands. (c) 2005 Elsevier SAS. All rights reserved.
吡唑-3-胺是存在于许多具有广泛生物活性的化合物中的支架,在许多情况下,杂环是C4–C5与第二个环稠合。在用于装饰吡唑环的不同反应中,Ullmann和酰化已得到广泛应用。然而,关于此类反应的区域选择性(吡唑环的N1或N2取代)的文献存在混淆,并且迄今尚未建立预测规则。作为我们对3-氨基-吡唑并[3,4- b ]吡啶酮的研究13,我们研究了在不同的C4–C5稠合的吡唑-3-胺中此类反应的区域选择性。根据经验,Ullmann和酰化反应主要发生在最稳定的初始互变异构体(1H-或2H-吡唑)的吡唑环的NH和非质子化氮原子上。通过使用DFT计算进行预测。
Overcoming Paradoxical Kinase Priming by a Novel MNK1 Inhibitor
作者:Elisabeth Bou-Petit、Stefan Hümmer、Helena Alarcon、Konstantin Slobodnyuk、Marta Cano-Galietero、Pedro Fuentes、Pedro J. Guijarro、María José Muñoz、Leticia Suarez-Cabrera、Anna Santamaria、Roger Estrada-Tejedor、José I. Borrell、Santiago Ramón y Cajal