An efficient approach to bis-benzoquinonylmethanes on water under catalysis of the bio-derived O-carboxymethyl chitosan

被引：13

作者：

Asghari-Haji, Fatereh ^{[1
]}

Rad-Moghadam, Kurosh ^{[1
]}

Mahmoodi, Nosrat O. ^{[1
]}

机构：

[1] Univ Guilan, Fac Sci, Dept Chem, POB 41335-1914, Rasht, Iran

来源：

RSC ADVANCES | 2016年 / 6卷 / 33期

关键词：

PALLADIUM CATALYST; DERIVATIVES; AGENTS; GREEN; ANTIPLATELET; ANTIFUNGAL; ACID; MICROSPHERES; LAWSONE;

D O I：

10.1039/c5ra26580k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Synthesis of the dyes 3,3'-(arylmethylene)bis(2-hydroxynaphthalene-1,4-diones) was achieved efficiently in mild and metal-free conditions from a pseudo three-component reaction between 2-hydroxynaphthalene-1,4-dione and aldehydes under catalysis of O-carboxymethyl chitosan as a green, available, low-cost, and water-soluble bio-derived catalyst. This method combines the advantages of homogeneous catalysis in aqueous medium with convenient recovery and repeated recycling of the polymeric catalyst. The catalytic action of O-carboxymethyl chitosan is reminiscent of soft catalysis of enzymes and seems to be exerted by proton donating and accepting functions of the ammonium and amino groups arranged along the backbone of the polymeric bio-inspired catalyst.

引用

页码：27388 / 27394

页数：7