Copper-Catalyzed C-C Bond Cleavage/Double Cyclization of α-Ketoamides with o-Phenylene Diamines: Synthesis of Benzimidazo[1,2-<i>c</i>
]quinazolin-6-ones
作者:Liang-Hua Zou、Cheng Yan、Kai Shi、Liang Su、Shuai Zhu、Zhe-Kang Jia、Qiuan Wang
DOI:10.1002/ejoc.201901642
日期:2019.12.19
α‐Ketoamides have been successfully employed to synthesize benzimidazo[1,2‐c]quinazolin‐6‐ones through C–Cbondcleavage/doublecyclization, in which two new C–N and one new C=N bonds are simultaneously formed by copper catalysis under air atmosphere. This new protocol provides an important foundation for the preparation of benzimidazo[1,2‐c]quinazolin‐6‐ones in high yields.
α-酮酰胺已成功用于通过C-C键裂解/双环化反应合成苯并咪唑[1,2 - c ]喹唑啉-6-酮,其中两个新的C–N和一个新的C = N键通过大气气氛下铜的催化作用。该新方案为高产率制备苯并咪唑[1,2 - c ]喹唑啉-6-酮提供了重要的基础。
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