One‐Pot Synthesis of Mono‐ and Disubstituted (3<i>H</i>)‐Quinazolin‐4‐ones in Dry Media Under Microwave Irradiation
作者:Minoo Dabiri、Peyman Salehi、Ali A. Mohammadi、Mostafa Baghbanzadeh
DOI:10.1081/scc-200048462
日期:2005.1
supported on silica gel is an efficient medium for one‐pot synthesis of (3H)‐quinazolin‐4‐ones in the absence of solvent undermicrowaveirradiation or classicalheating. The reaction of orthoesters with 2‐aminobenzamides ends up with the formation of monosubstituted (3H)‐quinazolin‐4‐ones. One‐pot synthesis of disubstituted (3H)‐quinazolin‐4‐ones is also achieved by the reaction of isatoic anhydride
KAl(SO4)2·12H2O (Alum) Catalyzed One-Pot Three-Component Synthesis of 2-Alkyl and 2-Aryl-4(3H)-quinazolinone under Microwave Irradiation and Solvent Free Conditions
作者:Ali A. Mohammadi、S. S. Sadat Hossini
DOI:10.1002/cjoc.201180344
日期:2011.9
3‐disubstituted‐4(3H)‐quinazolinones were synthesed by one‐pot three‐component method with isatoic anhydride, orthoesters and amines as raw materials in the presence of KAl(SO4)2·12H2O (Alum) undermicrowaveirradiation and solvent‐freeconditions. 6‐Bromo‐2‐propyl‐3‐p‐tolylquinazolin‐4(3H)‐one (4m), 6‐bromo‐2‐methyl‐3‐phenethylquinazolin‐4(3H)‐one (4n) and 6‐bromo‐2‐ethyl‐3‐phenethylquinazolin‐4(3H)‐one (4o)
在KAl(SO 4)2 ·12H 2 O(明矾)存在下,以等角酸酐,原酸酯和胺为原料,通过一锅三组分法合成了20种2,3-二取代-4(3 H)-喹唑啉酮。)在微波辐射和无溶剂条件下。6‐溴‐2‐丙基‐3‐对甲苯基喹唑啉‐4(3 H)‐1 (4m),6‐溴‐2‐甲基‐3‐苯乙基喹唑啉‐4(3 H)‐1 (4n)和6‐通过IR,1 H NMR,13 C NMR和元素分析对溴-2-乙基-3-苯基乙基喹唑啉-4(3 H)-one(4o)进行了表征。
A new approach to the facile synthesis of mono- and disubstituted quinazolin-4(3H)-ones under solvent-free conditions
作者:Peyman Salehi、Minoo Dabiri、Mohammad Ali Zolfigol、Mostafa Baghbanzadeh
DOI:10.1016/j.tetlet.2005.08.043
日期:2005.10
Quinazolin-4(3H)-one derivatives were synthesized successfully via a one-pot, three component reaction of isatoic anhydride and an orthoester with ammoniumacetate or a primary amine catalyzed by silica sulfuric acid under solvent-free conditions. This is the first report on the synthesis of 2-substituted quinazolin-4(3H)-ones by this procedure.
Microwave-assisted One-Pot Three Component Synthesis of Some New 4(3H)-Quinazolinone Derivatives
作者:Minoo Dabiri、Peyman Salehi、Mohammad S. Khajavi、Ali A. Mohammadi
DOI:10.3987/com-04-10042
日期:——
Efficient microwave-assisted synthesis of 4(3H)-quinazolinones by the one-pot three-component condensation of isatoic anhydride, primary amines and orthoesters in the presence of catalytic amounts of p-toluenesulfonic acid in high yields is reported.