Novel methodology for the synthesis of the benzo[b]phenanthridine and 6H-dibenzo[c,h]chromen-6-one skeletons. Reactions of 2-naphthylbenzylamines and 2-naphthylbenzyl alcohols
作者:Priyamvada Pradeep、Kennedy J. Ngwira、Chevonne Reynolds、Amanda L. Rousseau、Andreas Lemmerer、Manuel A. Fernandes、Myron M. Johnson、Charles B. de Koning
DOI:10.1016/j.tet.2016.10.071
日期:2016.12
syntheses of both the benzo[b]phenanthridine and the 6H-dibenzo[c,h]chromen-6-one motif are described. Reaction of (2-(3-bromo-1,4-dimethoxynaphthalen-2-yl)phenyl)methanamine with PIFA afforded benzo[b]phenanthridine-7,12-dione, while the related nonbrominated precursor, (2-(1,4,5-trimethoxynaphthalen-2-yl)phenyl)methanamine on treatment with PIFA, furnished the ortho-quinone 1-methoxybenzo[c]phenanthridine-11
描述了苯并[ b ]菲啶和6 H-二苯并[ c,h ] chromen-6-一个基序的新颖合成。(2-(3-溴-1,4-二甲氧基萘-2-基)苯基)甲胺与PIFA的反应制得苯并[ b ]菲啶-7,12-二酮,而相关的非溴化前体是(2-(1,用PIFA处理4,5-三甲氧基萘-2-基)苯基)甲胺,得到邻-醌-1-甲氧基苯并[ c ]菲啶-11,12-二酮。出乎意料的是,在O 2气氛下用NBS处理相关的氧类似物,例如(2-(1,4-二甲氧基萘-2-基)苯基)甲醇,得到色酮12-甲氧基-6 H-二苯并[ c,h]] chromen-6-one。