New Synthesis of Diazepino[3,2,1-<i>ij</i>]quinoline and Pyrido[1,2,3-<i>de</i>]quinoxalines via Addition-Elimination Followed by Cycloacylation
作者:Pier Giovanni Baraldi、Emanuela Ruggiero、Mojgan Aghazadeh Tabrizi
DOI:10.1002/jhet.1594
日期:2014.1
and efficient synthesis of new fused tricyclic diazepino[3,2,1‐ij]quinolines and substituted pyrido[1,2,3‐de]quinoxalines. o‐Phenylenediamines are transformed in the tricycle nucleus in only a few‐step synthetic sequence to produce ethyl 2,8‐dioxo‐1,2,3,4‐tetrahydro‐8H [1,4]diazepino[3,2,1‐ij]quinoline‐7‐carboxylate, ethyl 8‐oxo‐1,2,3,4‐tetrahydro‐8H‐[1,4]diazepino[3,2,1‐ij]quinoline‐7‐carboxylate
本文描述了一种新型的稠合三环重氮并庚并[3,2,1- ij ]喹啉和取代的吡啶并[1,2,3- de ]喹喔啉的便捷有效合成方法。邻苯二胺仅需几步合成即可在三环核中转化,生成乙基2,8-二氧代-1,2,3,4-四氢-8 H [1,4]二氮杂[3,2,1 - IJ ]喹啉-7-羧酸乙酯,8-氧代-1,2,3,4-四氢-8- ħ - [1,4]二氮杂并[3,2,1- IJ ]喹啉-7-甲酸甲酯和2- ,7-二氧代-2-3,2-二氢-1 H,7 H-吡啶基[1,2,3- de ]喹喔啉-6-羧酸盐。该方法经济且易于执行。