An efficient method to prepare 4-aminoquinazolines: Potential application to conformation-restricted bleomycin analogs
作者:Zhonglin Wei、Lianyou Zheng、Qun Dang、Xu Bai
DOI:10.1002/jhet.238
日期:2009.11
4‐aminoquinazolines were designed as conformation‐restricted bleomycinanalogs. An efficientmethod was developed to prepare the 4‐aminoquinazoline heterocyclic nucleus, which entails a two‐step one‐pot procedure leading to 4‐aminoquinazolines in good yields. The application of this method to synthesis 4‐aminoquinazoline bleomycinanalogs is envisioned. J. Heterocyclic Chem., (2009).
Palladium-Catalyzed Synthesis of 4-Aminoquinazolines from Amide Oxime Ethers and 2-Iodobenzonitrile
作者:M. Ya. Demakova、R. M. Islamova、V. V. Suslonov
DOI:10.1134/s1070363219040054
日期:2019.4
4-Substituted O-benzyl benzamide oximes reacted with 2-iodobenzonitrile in the presence of 0.1 mol % of [Pd2(dba)3], 0.2 mol % of XantPhos, and 1.5 equiv of Cs2CO3 in dioxane under argon to give 2-arylquinazolin-4-amines. The described reaction is a new type of cascade processes, which affords 4-amino-quinazoline derivatives without using highly reactive chlorinating agents.
在氩气下,在二恶烷中0.1摩尔%[Pd 2(dba)3 ],0.2摩尔%XantPhos和1.5摩尔当量Cs 2 CO 3的存在下,4-取代的O-苄基苯甲酰胺肟与2-碘苄腈反应2-芳基喹唑啉-4-胺。所描述的反应是一种新型的级联方法,其无需使用高反应性氯化剂即可得到4-氨基-喹唑啉衍生物。