Fe
<sub>3</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
@sulfated boric acid as superparamagnetic and recyclable nanocatalyst‐assisted, one‐pot,
<i>pseudo</i>
four‐component synthesis of 5‐amino‐2‐aryl‐3
<i>H</i>
‐chromeno[4,3,2‐
<i>de</i>
][1,6]naphthyridine‐4‐carbonitrile derivatives
作者:Zeynab Khosravi、Hadi Mohammadi、Hamid Reza Shaterian
DOI:10.1002/jccs.201900044
日期:2019.12
Fe3O4@SiO2@Sulfated boric acid as a green, recyclable, and acidic solid catalyst in the synthesis of chromeno[4,3,2‐de][1,6]naphthyridine derivatives has been studied. Chromeno[4,3,2‐de][1,6]naphthyridine derivatives via a pseudo four‐component reaction from aromatic aldehydes (1 mmol), malononitrile (2 mmol), and 2′‐hydroxyacetophenone in the presence of Fe3O4@SiO2@Sulfated boric acid (0.004 g) as a nanocatalyst
超顺磁性纳米催化剂Fe 3 O 4 @SiO 2 @硫酸化硼酸作为绿色,可循环利用和酸性固体催化剂,在合成铬诺[4,3,2- de ] [1,6]萘啶衍生物中具有被研究了。在Fe 3 O存在下,由芳香醛(1 mmol),丙二腈(2 mmol)和2'-羟基苯乙酮通过假四组分反应生成Chromeno [4,3,2- de ] [1,6]萘啶衍生物4 @SiO 2在80℃下,在3mL作为绿色溶剂的水中合成了作为纳米催化剂的硫酸化硼酸(0.004g)。该方法的优点是:在较短的反应时间内可以提高产品收率,催化剂的回收率和重复使用性易于操作,并且后处理程序也很容易。纳米催化剂被重复使用至少六次。纳米催化剂在反应中保持其稳定性,并且在可重复使用之后,其易于通过外部磁体与反应分离。