Co(NO3)2·6H2O as a powerful and reusable catalyst for the synthesis of phenylbenzo[g]chromenes
作者:Mehrnoush Kangani、Nourallah Hazeri、Malek-Taher Maghsoodlou
DOI:10.1007/s13738-017-1200-3
日期:2017.12
An efficient and easy protocol for the one-pot three-component synthesis of phenylbenzo[g]chromenes was developed. The synthesis was achieved by the reaction of aromatic aldehydes, Meldrum’s acid, and 2-hydroxynaphthalene-1,4-dione in the presence of catalytic amount of Co(NO3)2·6H2O at room temperature. The important advantages of this procedure are short reaction times, high yields, easy work-up, reusable catalyst, and no need to column chromatography.
开发了一种高效且简便的一锅法三组分合成苯并[g]色烯的协议。该合成通过在室温下,以催化量的Co(NO3)2·6H2O存在时,芳香醛、Meldrum酸和2-羟基萘-1,4-二酮的反应实现。该方法的重要优势包括反应时间短、产率高、操作简便、催化剂可重复使用以及无需柱层析。