摘要 开发了一种高效的铜催化一锅法,用于从易于获得的2-碘或2-溴代苯甲酰胺,醛和叠氮化钠合成4-氨基喹唑啉。这种一锅法是通过连续的铜催化的S N Ar取代,还原,环化,氧化和互变异构进行的。以50–90%的收率获得了相应的目标产品(26个实例)。 开发了一种高效的铜催化一锅法,用于从易于获得的2-碘或2-溴代苯甲酰胺,醛和叠氮化钠合成4-氨基喹唑啉。这种一锅法是通过连续的铜催化的S N Ar取代,还原,环化,氧化和互变异构进行的。以50–90%的收率获得了相应的目标产品(26个实例)。
efficient Fe/Cu relay-catalyzed domino protocol has been developed for the synthesis of 2-phenylquinazolin-4-amines from commercially available ortho-halogenated benzonitriles, aldehydes, and sodium azide. This elegant domino process involved consecutive iron-mediated [3 + 2] cycloaddition, copper-catalyzed SNAr, reduction, cyclization, oxidation, and copper-catalyzeddenitrogenation sequences. The formed structure
已经开发了一种高效的Fe / Cu中继催化多米诺协议,用于从可商购的邻卤代苄腈,醛和叠氮化钠合成2-苯基喹唑啉-4-胺。这种优美的多米诺骨牌工艺涉及连续的铁介导的[3 + 2]环加成,铜催化的S N Ar,还原,环化,氧化和铜催化的脱氮序列。形成的结构是药物和生物活性分子中的特权核心。
Novel domino synthesis of 2‐(2,3.4‐substituted phenyl) quinazolin‐4‐amine
作者:Walid Fathalla、Pavel Pazdera、Mohamed E. Khalifa、Ibrahim A. I. Ali、Samir M. El Rayes
DOI:10.1002/jhet.4435
日期:2022.5
Convenient domino protocol was developed for the synthesis of 2-arylquinazolin-4-amines by the reaction of N-(2-cyanophenyl) substituted benzimidoyl isothiocyanates with isopropyl amine. The major advantages of this protocol are short reaction times, mild conditions, simple work up, high yields, and pure products. The efficacy of this protocol owes to the competence of synthesis, pure isolation of
Efficient synthesis of 2-arylquinazolin-4-amines <i>via</i> a copper-catalyzed diazidation and ring expansion cascade of 2-arylindoles
作者:Meng-Meng Xu、Wen-Bin Cao、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1039/c8cc07721e
日期:——
Copper-catalyzedsynthesis of 2-arylquinazolin-4-amines from readily available 2-arylindoles and TMSN3 has been developed. The mechanism study shows that the domino reaction may involve a free radical diazidation, denitrogenation, intramolecular cyclization and ring expansion sequence.