One-Pot Synthesis of Isoxazole-Fused Tricyclic Quinazoline Alkaloid Derivatives via Intramolecular Cycloaddition of Propargyl-Substituted Methyl Azaarenes under Metal-Free Conditions
作者:Zhuo Wang、Yuhan Zhao、Jiaxin Chen、Mengyao Chen、Xuehan Li、Ting Jiang、Fang Liu、Xi Yang、Yuanyuan Sun、Yanping Zhu
DOI:10.3390/molecules28062787
日期:——
A practical method was developed for the convenient synthesis of isoxazole-fused tricyclic quinazoline alkaloids. This procedure accesses diverse isoxazole-fused tricyclic quinazoline alkaloids and their derivatives via intramolecular cycloaddition of methyl azaarenes with tert-butyl nitrite (TBN). In this method, TBN acts as the radical initiator and the source of N–O. Moreover, this protocol forms
开发了一种方便合成异恶唑稠合三环喹唑啉生物碱的实用方法。该程序通过甲基氮杂芳烃与亚硝酸叔丁酯 (TBN) 的分子内环加成反应,获得多种异恶唑稠合三环喹唑啉生物碱及其衍生物。在此方法中,TBN 充当自由基引发剂和 N-O 的来源。此外,该方案通过在具有广泛底物范围和天然产物功能化的一锅法中顺序硝化和环化形成新的 C-N、C-C 和 C-O 键。