Microwave-promoted one-pot three-component synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heteropolyanion-based ionic liquids under solvent-free conditions
3-dihydroquinazoline-4(1H)-one derivatives have been synthesized via one-pot three-component reaction using isatoic anhydrides, amines and aldehydes (or ketones) catalyzed by heteropolyanion-based ionic liquids under microwave-promoted conditions. The practical protocol was found to tolerate a wide range of substrates with different functional groups. Moderate to excellent yields, solvent-free media and operational
InBr3-catalyzed approach to synthesize 2,3-dihydroquinazolin-4(1H)-onederivatives (3a–3aa) has been developed. Notably, all the products were isolated by recrystallization and the reaction is accessible on a gram scale. Moreover, the reactions only require 10–60 min. All the synthesized compounds were evaluated for their in vitro anticanceractivity against four human cancer cell lines. GRAPHICAL ABSTRACT
An efficient, practical and atom-efficient method has been developed for the preparation of β-aminoketones and 2,3-dihydroquinazoline-4(1H)-ones via multicomponent one-pot reaction in starch solution as an entirely green catalyst. The advantages of this novel protocol are high yields, short reaction time, simple methodology, easy work-up and purification, lack of toxicity and eco-friendly catalyst. .
bis(indolyl)methanes was developed using 3,5-bis(trifluoromethyl) phenyl ammonium hexafluorophosphate (BFPHP) as a novel organocatalyst. MATERIALS AND METHODS All of the obtained products are known compounds and identified by IR, 1HNMR, 13CNMR and melting points. RESULT Various products were obtained in good to excellent yields under reaction conditions. CONCLUSION The BFPHP organocatalyst demonstrates a novel class
A three‐component process for the synthesis of 2,3‐dihydroquinazolin‐4(1
<i>H</i>
)‐one derivatives using nanosized nickel aluminate spinel crystals as highly efficient catalysts
作者:Javad Safaei‐Ghomi、Raheleh Teymuri
DOI:10.1002/jccs.201800450
日期:2019.11
catalyzed the synthesis of 2,3‐dihydroquinazolin‐4(1H)‐one derivatives via a one‐pot, three‐component condensation reaction of aromatic aldehydes, isatoic anhydride, and ammonium acetate or primary aromaticamine under microwave irradiation. By far, the most obvious advantages of the offered process are efficiency and recyclability of the catalyst as well as a significantly shorter reaction time.
NiAl 2 O 4尖晶石纳米晶体被合成为介孔催化剂,并使用傅立叶变换红外光谱(FT-IR),X射线衍射图谱(XRD),扫描电子显微镜(SEM)和能量分散X射线对其进行了全面表征光谱学(EDS)。这些纳米晶体在微波辐射下通过芳族醛,isatoic酸酐和乙酸铵或伯芳族胺的一锅三组分缩合反应催化了2,3-二氢喹唑啉-4(1 H)-one衍生物的合成。到目前为止,所提供方法的最明显优点是催化剂的效率和可回收性以及明显缩短的反应时间。