A Facile and Convenient Synthetic Method for Fluorine-Containing Benz[<i>c</i>]acridines and Dihydrobenz[<i>c</i>]acridines from<i>N,N</i>-Dimethyl-1-naphthylamine
作者:Masaru Hojo、Ryoichi Masuda、Etsuji Okada、Takeshi Tomifuji、Naonori Imazaki
DOI:10.1055/s-1990-27114
日期:——
Aromatic nucleophilic nitrogen-nitrogen exchange reaction of N,N-dimethyl-2, 4-bis(trifluoroacetyl)-1-naphthylamine (1) with p-substituted anilines gives the corresponding N-aryl-2,4-bis(trifluoroacetyl)-1-naphthylamines 2 in high yield. Acid-catalyzed cyclization of 2 affords selectively fluorine-containing benz[c]acridines 3 in almost quantitative yield, while the base-catalyzed cyclization gives fluorine-containing 7,12-dihydrobenz[c]acridines 4 in fair yield.
通过 N,N-二甲基-2,4-双(三氟乙酰基)-1-萘胺 (1) 与对取代苯胺的芳香族亲核氮-氮交换反应,可以高产率得到相应的 N-芳基-2,4-双(三氟乙酰基)-1-萘胺 2。酸催化 2 的环化反应可选择性地得到含氟的苯并[c]吖啶 3,收率接近定量,而碱催化的环化反应则可得到含氟的 7,12-二氢苯并[c]吖啶 4,收率尚可。