electrophilic nature of quinoxaline has been explored in the vicarious nucleophilic substitution (VNS) of hydrogen with various carbanions as nucleophiles in an attempt to develop a general method for functionalizing the heterocyclic ring. Only poorly stabilized nitrile carbanions were found to give the VNS products. 2-Chloroquinoxaline gave products of SNAr of chlorine preferentially. A variety of quinoxaline
喹喔啉的亲电性质已在氢与各种碳负离子作为亲核试剂的替代亲核取代 (VNS) 中进行了探索,以试图开发一种使杂环功能化的通用方法。只有不稳定的腈碳负离子被发现能提供 VNS 产品。2-
氯喹喔啉优先生成
氯的S N Ar产物。在与
喹喔啉N-氧化物的 VNS 反应中,已经制备了多种含有
氰基烷基、磺酰烷基、苄基或酯取代基(包括
氟化的)的
喹喔啉衍
生物。