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
Reaction of benzyl alcohols, isatoic anhydride, and primary amines mediated by I 2 /K 2 CO 3 in water: a new and green approach for the synthesis of 2,3-dihydroquinazolin-4(1 H )-ones
作者:Seyedeh Bahareh Azimi、Javad Azizian
DOI:10.1016/j.tetlet.2015.11.090
日期:2016.1
An efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones proceeding via a three-component reaction between benzyl alcohols, isatoicanhydride, and primaryamines in the presence of iodine and potassium carbonate is reported. This protocol allows the straightforward preparation of the titled products using readily available benzyl alcohols instead of unstable aldehydes under mild oxidative conditions
Supported ceric ammonium nitrate: A highly efficient catalytic system for the synthesis of diversified 2,3-substituted 2,3-dihydroquinazolin-4(1H)-ones
作者:Someshwar D. Dindulkar、Jeongsu Oh、Veenita M. Arole、Yeon Tae Jeong
DOI:10.1016/j.crci.2013.11.008
日期:2014.10
Résumé A practically expeditious protocol has been developed for the cascade synthesis of 2,3-dihydroquinazolin-4(1H)-ones via the condensation of 2-aminobenzamide/2-aminobenzanilide and aromatic aldehydes using a catalytic amount of silica-supported ceric ammonium nitrate. This method affords rapid transformation at room temperature with good to excellent yields. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.doc
Mukaiyama’s reagent promoted mild protocol for one-pot metal-free synthesis of dihydro quinazolinones
作者:Chatrasal S. Rajput、Shweta Srivastava、Ashish Kumar、Arunendra Pathak
DOI:10.1016/j.tetlet.2020.152791
日期:2021.2
reagent. The reactions proceeded smoothly with a broad scope of substrates providing the expected products in good to excellent yields under with a low environmental factor and high atom economy. The metal-free condition and the ease of product isolation are the highlighted advantages in solving the issue of trace metal contamination in synthesized pharmaceuticals.