...
首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Alginic acid: A mild and renewable bifunctional heterogeneous biopolymeric organocatalyst for efficient and facile synthesis of polyhydroquinolines
【24h】

Alginic acid: A mild and renewable bifunctional heterogeneous biopolymeric organocatalyst for efficient and facile synthesis of polyhydroquinolines

机译:藻酸:一种温和和可再生的双官能异质生物聚合物有机催化剂,用于高羟基喹啉的有效和容易合成

获取原文
获取原文并翻译 | 示例
           

摘要

Alginic acid, a widely used naturally occurring carbohydrate which is generally derived from brown seaweeds, can be considered as a bifunctional heterogeneous and green biopolymeric organocatalyst. Alginic acid, without any post-modification with active Bronsted or Lewis acid centers, was found to be a highly active, cost-effective, commercially-available, renewable and recoverable heterogeneous biopolymeric organocatalyst for the expeditious synthesis of polyhydroquinolines (PHQs). Polyhydroquinolines were synthesized from the four-component Hantzsch reaction of ethyl acetoacetate, different aldehydes, ammonium acetate and cyclic 1,3-diones under mild conditions in high to quantitative yields, 75-97%, using alginic acid. Furthermore, alginic acid was found to be reusable for at least 6 consecutive cycles without considerable loss of its catalytic activity. (C) 2017 Elsevier B.V. All rights reserved.
机译:海藻酸,广泛使用的天然存在的碳水化合物通常来自棕色海藻,可被认为是双官能的异质和绿色生物聚合物有机催化剂。 没有任何用活性伪造或路易斯酸中心进行任何后改性的藻酸是一种高度活性,成本效益,可商购,可再生和可回收的非均相生物聚合的生物聚合体,用于迅速合成多羟基喹啉(PHQs)。 使用藻酸的温和条件下,从乙酰乙酸乙酯,不同醛,乙酸铵,乙酸铵和环状1,3-致乙酯的四组分汉坦斯,不同的醛酸盐和环状1,3℃合成多羟基喹啉。使用藻酸,75-97%。 此外,发现活性酸可重复使用至少6个连续循环,而不具有相当大的催化活性损失。 (c)2017年Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号