作者:Francisco Fariña、M.Carmen Paredes、Valter Stefani
DOI:10.1016/s0040-4020(01)87657-2
日期:1986.1
Diels-Alder reactions of 5-amino-8-hydroxy-1, 4-naphthoquinone () and derivatives (-) with cyclopentadiene and 2, 3-dimethylbuta-1, 3-diene afford the corresponding adducts - and - in good yields. Adducts and , by oxidation under alkaline conditions in the presence of air, are converted into quinones and , respectively. Quinone undergoes a novel transcycloaddition reaction with 2, 3-dimethylbuta-1
5-氨基-8-羟基-1、4-萘醌()和衍生物(- )与环戊二烯和2,3-二甲基丁-1、3-二烯的Diels-Alder反应以良好的收率得到相应的加合物-和- 。在空气中碱性条件下通过氧化将加合物和分别转化为醌和。醌与2、3-二甲基丁1、3-二烯进行新型的环加成反应,该反应涉及环加成以生成角加合物n和x,然后进行环还原以生成环戊二烯。醌类似地与重氮甲烷进行跨环加成反应得到单一的苯并[ ]吲唑。反向区域化学观察从起始,-diacyl衍生物。据报道与5,8-二甲氧基-1、4-二氢-1、4-甲基蒽-9、10-二酮类似的跨环加成。