Biomimetic synthesis of pyrido [2,3,4-kl]acridines
摘要:
A short new biomimetic route to the pyrido[2,3,4-kl]acridine ring system has been developed from readily available benzoquinone, or hydroquinone precursors, and beta,beta'-diaminoketones like kynuramine (3) or 2,2'-diaminobenzophenone (4), involving one key step. Pyrido[2,3,4-kl]acridine and closely related compounds have been prepared (5-9). The reaction has been shown to proceed to the formation of 1:1 and/or 1:2 quinone/amine adducts. Using of o-aminoacetophenone afforded dibenzo[1,10]phenanthrolinedione (11) a potential intermediate to eilatin 2.