Direct synthesis of highly fused perimidines by copper(I)-catalyzed hydroamination of 2-ethynylbenzaldehydes
作者:Yusuke Tokimizu、Yusuke Ohta、Hiroaki Chiba、Shinya Oishi、Nobutaka Fujii、Hiroaki Ohno
DOI:10.1016/j.tet.2011.05.051
日期:2011.7
A novel synthesis of highly fused perimidine derivatives was achieved in two steps from 2-alkynylbenzaldehydes. Copper-catalyzed annulation of 2-[(2-bromophenyl)ethynyl]benzaldehydes with 1,8-diaminonaphthalene produced dihydroisoquinolino[2,1-a]perimidines bearing a 2-bromophenyl group. Subsequent palladium-catalyzed C–H arylation provided dibenzo[1,2:7,8]quinolizino[3,4,5,6-kla]perimidine derivatives
由2-炔基苯甲醛分两步完成了高度稠合的perimidine衍生物的新型合成。铜催化的2-[((2-溴苯基)乙炔基]苯甲醛与1,8-二氨基萘的环合反应生成了带有2-溴苯基的二氢异喹啉代[ 2,1- a ] perimidines。随后钯催化的CH芳基化反应以中等至良好的收率提供了二苯并[1,2:7,8]喹啉嗪[ 3,4,5,6-kla ]过im啶衍生物。