作者:Mercedes Álvarez、Lidia Feliu、Wadi Ajana、John A. Joule、José Luis Fernández-Puentes
DOI:10.1002/(sici)1099-0690(200003)2000:5<849::aid-ejoc849>3.0.co;2-r
日期:2000.3
Ascididemine (9H-quino[4,3,2-de][1,10]phenanthrolin-9-one) (1) and an isomer (9H-quino[4,3,2-de][1,7]phenanthrolin-9-one) (4) have been synthesized starting from 1,4-dimethoxyacridone (7). The acridone was converted into 1,4-dimethoxy-9-ethynylacridine (11) by a triflate coupling. The ethynylacridine was converted in one-pot into 3H-6-methoxypyrido[2,3,4-kl]acridine (15) by reaction with sodium diformylamide;
Ascididemine (9H-quino[4,3,2-de][1,10]phenanthrolin-9-one) (1) 和异构体 (9H-quino[4,3,2-de][1,7]phenanthrolin -9-one) (4) 已从 1,4-二甲氧基吖啶酮 (7) 开始合成。通过三氟甲磺酸酯偶联,吖啶酮被转化为 1,4-二甲氧基-9-乙炔基吖啶 (11)。通过与二甲酰胺钠反应,乙炔丙啶在一锅中转化为3H-6-甲氧基吡啶并[2,3,4-kl]吖啶(15);讨论了这种关键转变的机制。转化为 6H-4-溴吡啶并[2,3,4-kl]吖啶-6-酮 (19) 和 6H-吡啶并[2,3,4-kl]吖啶-6-酮 (17),然后反应这些中的每一个在高压条件下与丙烯醛N,N-二甲基腙,分别得到ascididemine及其异构体。