β-Cyclodextrin Mediated Multicomponent Synthesis of
Spiroindole Derivatives in Aqueous Medium
作者:Vishwa Deepak Tripathi
DOI:10.14233/ajchem.2020.22311
日期:2020.1.15
An efficient β-cyclodextrin catalyzed multicomponent synthetic protocol has been developed for the synthesis of spiro[indoline-3,2'-quinazoline]-2,4'(3’H)-dione from isatoic anhydride, isatin and primary amine in aqueous medium. This methodology offers a convenient method for the synthesis of spiroindole quinazolines in excellent yields. To extend synthetic utility of protocol some dihydro quinazolines
Powdered diethylaminoethyl cellulose as biomass-derived support for phosphotungstic acid: new solid acidic catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:Shaokang Li、Qianqian Zhang、Yanqing Peng
DOI:10.1007/s00706-015-1475-y
日期:2015.11
as solvent. Phosphotungstic acid anchored on the powdered diethylaminoethyl cellulose can be used as a biopolymer-supported solid acidic catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones fromisatoicanhydride, amines, and aldehydes. The catalyst could be easily recovered by simple filtration and reused several times with minor decreases in the reactionyields. Graphical abstract
Application of the ultrasound in the mild synthesis of substituted 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heterogeneous metal–MWCNTs nanocomposites
作者:Javad Safari、Soheila Gandomi-Ravandi
DOI:10.1016/j.molstruc.2014.05.002
日期:2014.8
Abstract A practical method were applied successfully to synthesize mono- and disubstituted dihydroquinazolinones through three-component condensation of isatoic anhydride, primary amines or ammonium acetate with aromatic aldehydes in the presence of some transition metals–multi-walled carbon nanotubes under sonication. Also, metals supported on MWCNTs showed excellent catalytic performance for above-mentioned
Synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot three-component reaction catalyzed by l-pyrrolidine-2-carboxylic acid-4-hydrogen sulfate (supported on silica gel) as novel and recoverable catalyst
作者:Arash Ghorbani-Choghamarani、Parisa Zamani
DOI:10.1007/s13738-012-0074-7
日期:2012.8
A wide variety of 2,3-dihydroquinazolin-4(1H)-ones has been prepared via one-pot three-component condensation of isatoic anhydride, aldehydes and primary amines or ammonium acetate in the presence of a catalytic amounts of l-pyrrolidine-2-carboxylic acid-4-hydrogen sulfate (supported on silica gel), as green, non-toxic and reusable catalyst, in water at 80 °C.
Green and One-Pot Three-Component Synthesis of 2,3-Dihydroquinazolin- 4(1H)-Ones Promoted by Citric Acid as Recoverable Catalyst in Water
作者:Arash Ghorbani-Choghamarani、Tahereh Taghipour
DOI:10.2174/157017811796505025
日期:2011.9.1
Citric acid was used as green, non-toxic and reusable catalyst for the preparation of substituted 2,3- dihydroquinazolin-4(1H)ones in high purity and good yields via one-pot three-component reaction of isatoic anhydride with a variety of aldehydes and primary amines or ammonium acetate in water at 80 ° C.
利用柠檬酸作为绿色、无毒和可重复使用的催化剂,通过异酸酐与多种醛类和伯胺或醋酸铵在 80 ° C 水中的一锅三组分反应,制备了纯度高、收率好的取代型 2,3-二氢喹唑啉-4(1H)。