Nickel-Catalyzed Aerobic Oxidative Isocyanide Insertion: Access to Benzimidazoquinazoline Derivatives via a Sequential Double Annulation Cascade (SDAC) Strategy
作者:Anand H. Shinde、Sagar Arepally、Mayur D. Baravkar、Duddu S. Sharada
DOI:10.1021/acs.joc.6b02423
日期:2017.1.6
An efficient protocol for the synthesis of quinazoline derivatives through nickel-catalyzed ligand-/base-free oxidative isocyanide insertion under aerobic conditions with intramolecular bis-amine nucleophiles has been developed. A one-pot sequential double annulation cascade (SDAC) strategy involving an opening of isatoic anhydride and annulation to benzimidazole and further nickel-catalyzed intramolecular
已经开发了一种有效的方案,该方案通过在有氧条件下使用分子内双胺亲核试剂插入镍催化的无配体/无碱的氧化异氰酸酯来合成喹唑啉衍生物。还已经证明了一种一锅式顺序双环级联反应(SDAC)策略,该策略涉及打开等位酸酐并环化成苯并咪唑,以及进一步的镍催化的分子内异氰酸酯插入。该方法操作简便,可用于多种底物,是形成多个C–N键的一种新方法。该方法已成功地通过脱保护-GBB反应序列应用于迄今未报道的咪唑并稠合的苯并咪唑并喹唑啉的合成。进一步,