Synthesis of imidazo[1,2-<i>c</i>]quinazolin-5(6<i>H</i>)-ones and benzimidazo[1,2-<i>c</i>]quinazolin-6(5<i>H</i>)-ones with the aid of low-valent titanium reagent
作者:Xuan Zhao、Da-Qing Shi
DOI:10.1002/jhet.353
日期:——
A short and facile synthesis of imidazo[1,2-c]quinazolin-5(6H)-ones and benzimidazo[1,2-c]quinazolin-6(5H)-ones was accomplished in good yields via the novel reductive cyclization of 2-(2-nitrophenyl)imidazoles or 2-(2-nitrophenyl)benzoimidazoles with isocyanates promoted by low-valenttitaniumreagent. J. Heterocyclic Chem., (2010).
通过新颖的还原反应,以良好的收率完成了咪唑并[1,2 - c ]喹唑啉-5(6 H)-one和苯并咪唑并[1,2 - c ]喹唑啉-6(5 H)-one的短而容易的合成。低价钛试剂促进异氰酸酯对2-(2-硝基苯基)咪唑或2-(2-硝基苯基)苯并咪唑的环化反应。J.杂环化学。(2010)。
Divergent Approach for Regioselective Synthesis of Linearly and Angularly Fused Benzoimidazoquinazolinones from Isatoic Anhydrides
regioselective syntheses of a wide range of linearly and angularly fused benzoimidazoquinazolinones. The selectivity of the products relies on the generation of either highly electrophilic oxyphosphonium or less reactive imidate intermediates. A direct amine attack at the C-2 position of the oxyphosphonium intermediate presumably drives the reaction toward the linearly fused products, whereas an attack of
[EN] METHOD FOR SYNTHESIZING BENZOIMIDAZOQUINAZOLINONE COMPOUND<br/>[FR] PROCÉDÉ DE SYNTHÈSE D'UN COMPOSÉ DE BENZOIMIDAZOQUINAZOLINONE<br/>[ZH] 一种苯并咪唑并喹唑啉酮化合物的合成方法
Synthetic Method for Benzimidazo[1,2-c]quinazolin-6-ones
申请人:Jiangnan University
公开号:US20210087199A1
公开(公告)日:2021-03-25
The disclosure discloses a synthetic method for benzimidazo[1,2-c]quinazolin-6-ones and belongs to the field of organic synthesis. In the disclosure, an α-ketoamide compound shown as Formula I and an o-phenylenediamine compound shown as Formula II are used as substrates and undergo a reaction under the action of a catalyst and a base to obtain benzimidazo[1,2-c]quinazolin-6-ones shown as Formula III. In the disclosure, benzimidazo[1,2-c]quinazolin-6-ones are prepared based on a novel and efficient action mechanism, and the disclosure has the advantages that the raw materials are cheap, the catalyst is cheap and easy to obtain, the reaction is efficient and environmentally friendly, the substrate range is wide, the yield is high, and the operation is simple.