[EN] SEALING AGENT FOR LIQUID CRYSTAL DISPLAY ELEMENTS AND LIQUID CRYSTAL DISPLAY ELEMENT<br/>[FR] AGENT D'ÉTANCHÉITÉ POUR ÉLÉMENTS D'AFFICHAGE À CRISTAUX LIQUIDES ET ÉLÉMENT D'AFFICHAGE À CRISTAUX LIQUIDES ASSOCIÉ<br/>[JA] 液晶表示素子用シール剤及び液晶表示素子
One-pot catalyst-free synthesis of 3-heterocyclic coumarins
作者:Shaoliang Jiang、Jianrong Gao、Liang Han
DOI:10.1007/s11164-015-2070-x
日期:2016.2
3-Heterocyclic coumarins were prepared in one-pot three-component reaction without catalyst. The mixture of salicylaldehydes, ethyl cyanoacetate, and o-aminophenols or o-phenylenediamines in refluxing n-butanol gave title compounds with good yields and high purity. Short reaction time, mild reaction condition, simple workup, and less waste are significant advantages of the presented method.