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Reductive amination of levulinic acid to N-substituted pyrrolidones over RuCl3 metal ion anchored in ionic liquid immobilized on graphene oxide
Journal of Catalysis ( IF 6.5 ) Pub Date : 2020-02-12 , DOI: 10.1016/j.jcat.2020.01.020
Amol B. Raut , Vaishali S. Shende , Takehiko Sasaki , Bhalchandra M. Bhanage

Reductive amination of biomass derived Levulinic acid (LA) for the synthesis of N-substituted pyrrolidones is one of the highly attractive routes for biomass valorization. The supported homogeneous metal precursor into the solid surface is an important context in the field of catalysis because these types of catalysts provide the heterogeneous nature and meet the needs of recyclability. Herein, we have reported a synthesis of catalyst with ruthenium ion supported on ionic liquid immobilized into graphene oxide ([email protected]) and its application for reductive amination reaction. Synthesized catalyst is characterized using different analytical techniques such as FT-IR, XRD, XPS, TGA, FEG-SEM, TEM and EXAFS analysis. The prepared [email protected] found to be highly effective for reductive amination of LA and under these optimized conditions various N-substituted pyrrolidones derivatives were synthesized in excellent yield (78–93%). [email protected] catalyst demonstrated great catalytic performance for reductive amination reaction of LA giving good turnover frequency (TOF = 62 h−1) value in comparison with other catalysts. The [email protected] catalyst was recycled for six reaction runs with slight drop-in activity after 4th cycle. Practical applicability of the developed catalyst was successfully demonstrated by direct transformation of biomass waste (rice husk and wheat straw) derived LA to N-substituted pyrrolidones.



中文翻译:

固定在氧化石墨烯上的离子液体中固定的RuCl 3金属离子上的乙酰丙酸还原胺化为N-取代的吡咯烷酮

生物质衍生的叶绿酸(LA)的还原胺化反应,用于合成N取代的吡咯烷酮是生物质增值的极具吸引力的途径之一。负载到固体表面中的均相金属前体在催化领域是重要的背景,因为这些类型的催化剂提供了非均相性质并满足了可回收性的需求。在此,我们已经报道了将钌离子负载在固定于氧化石墨烯的离子液体上的催化剂的合成方法([电子邮件保护])及其在还原胺化反应中的应用。使用不同的分析技术(例如FT-IR,XRD,XPS,TGA,FEG-SEM,TEM和EXAFS分析)对合成的催化剂进行表征。发现制备的[受电子邮件保护]对LA的还原胺化非常有效,在这些优化条件下,各种N取代的吡咯烷酮衍生物的合成产率极高(78-93%)。[受电子邮件保护]催化剂与其他催化剂相比,在LA的还原胺化反应中表现出出色的催化性能,具有良好的周转频率(TOF = 62 h -1)。[电子邮件保护的]催化剂在4循环后循环进行了6次反应,活性略有下降。通过将生物质废料(稻壳和小麦秸秆)衍生的LA直接转化为N-取代的吡咯烷酮,已成功证明了所开发催化剂的实际适用性。

更新日期:2020-02-20
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