Design, synthesis, and antibacterial activity of novel Schiff base derivatives of quinazolin-4(3H)-one
作者:Xiang Wang、Juan Yin、Li Shi、Guoping Zhang、Baoan Song
DOI:10.1016/j.ejmech.2014.02.053
日期:2014.4
Novel imine derivatives of quinazolin-4(3H)-one were designed and synthesized by using aminoethyl moieties to increase the amine bridge of quinazolin-4(3H)-one amine and then introducing various aromatic aldehydes. The target compounds were characterized by proton nuclear magnetic resonance spectroscopy (1H NMR), carbon nuclear magnetic resonance spectroscopy (13C NMR), mass spectrometry (MS), infrared
设计并合成了一种新型的喹唑啉-4(3 H)-亚胺衍生物,其方法是使用氨乙基部分增加喹唑啉-4(3 H)-一胺的胺桥,然后引入各种芳香醛。目标化合物通过质子核磁共振波谱(1 H NMR),碳核磁共振波谱(13 C NMR),质谱(MS),红外光谱(IR),元素分析和X射线衍射晶体学进行表征。生物测定结果表明,某些化合物对烟草青枯病和番茄青枯病具有良好的抗菌性能。50%有效浓度(EC 50)化合物对烟草和番茄的细菌性枯萎病的范围分别为63.73μg/ mL至201.52μg/ mL和38.64μg/ mL至81.39μg/ mL,低于阳性对照的噻二唑铜(216.70和99.80μg/ mL)。毫升)。这些结果表明,含有4(3 H)-喹唑啉酮部分的新型席夫碱衍生物可以有效地控制烟草和番茄的枯萎病。
Functionalized Carbodiimide Mediated Synthesis of 2,3-Disubstituted Quinazolin-4(3H)-ones via the Tandem Strategy of C-Nucleophilic Addition and Intramolecular NH-Substitution Cyclization
作者:Takao Saito、Hayato Nakano、Noriki Kutsumura
DOI:10.1055/s-0032-1316773
日期:——
moiety at the proximal estergroup. A facile synthesis of quinazolin-4(3H)-ones possessing carbon substituents at positions 2 and 3 has been developed. Key to the synthesis is a tandem strategy involving introduction of a 2-substituent and construction of the quinazolinone framework via C-nucleophilic addition to the carbodiimide cumulenic carbon followed by intramolecular nucleophilic substitution by
A Facile Synthesis of 2-Mino-3H-Quinazolin-4-Ones with Tandem Aza-Wittig Reaction
作者:Ming-Wu Ding、Gui-Ping Zeng、Tian-Jie Wu
DOI:10.1080/00397910008087195
日期:2000.4.1
Abstract 2-Amino-3H-quinazolin-4-ones 8 were prepared from tandem aza-Wittig reaction of iminophosphorane 5 with aromatic isocyanate and nucleaphilic reagent HY in mild condition.
Design, synthesis, and evaluation of new 4(
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)‐quinazolinone derivatives containing a pyrazole carboxamide moiety
作者:Xiang Wang、Xiaoyu Wang、Banghua Zhou、Jiefeng Long、Pei Li
DOI:10.1002/jhet.4334
日期:2021.11
well as antibacterial activities against Ralstonia solanacearum (R. solanacearum) and Xanthomomu oryzae pv. oryzae (Xoo) were assayed. Bioassay results revealed that the target compounds have certain antifungal and antibacterial activities. Especially, compound 5-chloro-1,3-dimethyl-N-(2-(4-oxo-2-(m-tolylamino)quinazolin-3(4H)-yl)ethyl)-1H-pyrazole-4-carboxamide (7g) exhibited better antibacterial activities
本研究共设计并合成了 15 种含有吡唑甲酰胺部分的新型 4(3 H )-喹唑啉酮衍生物。使用1 H NMR、13 C NMR、MS 和元素分析阐明了目标化合物的结构。然后,抗真菌活性对玉米赤霉( G. zeae )、尖孢镰刀菌( F. oxysporum )、Cytospora mandshurica ( C. mandshurica )、致病疫霉( P. infestans ) 和Pellicularia sasakii ( P. sasakii ) 具有抗菌活性反对Ralstonia solanacearum ( R. solanacearum ) 和Xanthomomu oryzae pv。对稻瘟病菌( Xoo ) 进行了测定。生物测定结果表明,目标化合物具有一定的抗真菌和抗菌活性。特别是,化合物5-氯-1,3-二甲基- ñ - (2-(4-氧代-2-(米-tolylamino)喹唑啉-3(4
Synthesis of 3-aminoalkyl-2-arylaminoquiazolin-4(3<i>H</i>)-ones and 3,3′-disubstituted bis-2-arylaminoquinazolin-4(3<i>H</i>)-ones<i>via</i>reactions of 1-aryl-3-(2-ethoxycarbonylphenyl)carbodiimides with diamines
1-Aryl-3-(2-ethoxycarbonylphenyl)carbodiimides 2, obtained from aza-Wittig reactions of iminophosphorane 1 with aryl isocyanates, reacted with primary diamines in 1:1 and 2:1 molar ratio under mild conditions to give selectively the regioisomers 3-aminoalkyl-2-arylaminoquinazolin-4(3H)-ones 3 and 3,3′-disubstitutedbis-2-arylaminoquinazolin-4(3H)-ones 4 in good yields, respectively. To fully characterize