4-氧代-1-苯基-4,7-二氢吡唑并[3,4- b ]吡啶-5-腈化合物(4)是通过5-氨基-3-甲基-1-苯基吡唑的反应制备的(1)用2-氰基-3-乙氧基丙烯酸乙酯,然后用二苯醚环化。通过与三氯氧化磷反应,将吡唑并吡啶吡啶酮化合物4转化为氯吡唑并吡啶5。化合物5被用作合成3-氨基-4-取代的吡唑并噻吩并吡啶衍生物10a-f和乙基3-氨基吡唑并吡咯并吡啶-2-羧酸乙酯21的原料,它们被用作合成多稠合杂环化合物的通用前体。
Synthesis of New Conjugates 1H‑Pyrazolo[3,4-b]pyridine-phosphoramidate and Evaluation against Leishmania amazonensis
摘要:
In this research three series of substituted 1H-pyrazolo[3,4-b]pyridine phosphoramidates were synthesized and characterized by infrared, H-1, C-13, and P-31 nuclear magnetic resonance (NMR) spectroscopy and high-resolution mass spectrometry. The products were obtained in good yields (67-83%) under mild conditions by nucleophilic aromatic substitution reaction of aminoalkylphosphoramidates over 4-chloro-1H-pyrazolo[3,4-b]pyridines. These compounds were evaluated as antileishmanials against Leishmania amazonensis promastigotes in vitro. Among all, compounds of a series showed expressive antileishmanial activity. Two of them emerged as the most active, with IC50 values of 6.44 +/- 1.49 and 12.25 +/- 0.68 mu M. The cytotoxicity of this series was assessed on murine cells and presented values similar to the reference drug pentamidine.
Synthesis of Newly Substituted Pyrazoles and Substituted Pyrazolo[3,4-<i>b</i>]Pyridines Based on 5-Amino-3-Methyl-1-Phenylpyrazole
作者:Talaat I. El-Emary
DOI:10.1002/jccs.200700072
日期:2007.4
10b was produced through reaction of 9 with acetophenone. Reaction of 1 with benzylidinemalononitrile afforded 11. New methods for preparation of 15 and 16 are described. The reaction of 8 with malononitrile, thio-semicarbazide, phenyl hydrazine and acetophenone afforded compounds 18-21. The reaction of 21 with malononitrile gave 22. Compounds 23-26 were produced upon reaction of 10a with malononitrile
Synthesis of Fused Pyrimidinone and Quinolone Derivatives in an Automated High-Temperature and High-Pressure Flow Reactor
作者:Jennifer Tsoung、Andrew R. Bogdan、Stanislaw Kantor、Ying Wang、Manwika Charaschanya、Stevan W. Djuric
DOI:10.1021/acs.joc.6b02520
日期:2017.1.20
pyrimidinone and quinolone derivatives that are of potential interest to pharmaceutical research were synthesized within minutes in up to 96% yield in an automated Phoenix high-temperature and high-pressure continuous flow reactor. Heterocyclic scaffolds that are either hard to synthesize or require multisteps are readily accessible using a common set of reaction conditions. The use of low-boiling solvents