Solvent-free synthesis of polyhydroquinoline and 1,8-dioxodecahydroacridine derivatives through the Hantzsch reaction catalyzed by a natural organic acid: A green method
ABSTRACT Solvent-free and high yielding one-pot synthesis of 1,8-dioxodecahydroacridine and polyhydroquinoline derivatives have been described through Hantzsch condensation of various aldehydes, ammonium acetate with cyclic 1,3-dicarbonyl compounds and ethyl acetoacetate in a very simple, efficient, and environmentally benign method using ascorbic acid as a nontoxic organocatalyst. GRAPHICAL ABSTRACT
Immobilization of papain onto nitrogen graphene quantum dots and its use as an efficient catalyst for facile MW-assisted synthesis of polyhydroquinolines
through the four-component fusion of dimedone, ethyl acetoacetate, and ammonia with different chosen arylaldehydes, under rapid, simple, and mild solvent-free conditions. This protocol offers some interesting benefits such as excellent yields (98–100%), very easy handling, simple workup procedure, economy, cleaner reaction profile, and shorter reaction times (2–3 min). All the products were characterized
Ionic liquid immobilized on modified magnetic FSM-16: an efficient and magnetically recoverable nanocatalyst
作者:Azar Jahanbakhshi、Mahnaz Farahi
DOI:10.1039/d3ra04953a
日期:——
on the magnetic mesoporous FSM-16 with a core–shellstructure (Fe3O4@FSM-16-SO3/IL). Subsequently, the structural properties of the synthesized nanocatalyst were characterized and analyzed by various techniques such as XRD, FT-IR, TEM, FE-SEM, BET, VSM, TGA, and EDS. Fe3O4@FSM-16-SO3/IL was used as a recoverable and efficient nanocatalyst for the synthesis of polyhydroquinolinederivatives. The magnetic
在本文中,通过将离子液体固定在具有核壳结构的磁性介孔FSM-16(Fe 3 O 4 @FSM-16-SO 3 /IL)上制备了纳米复合材料。随后,通过 XRD、FT-IR、TEM、FE-SEM、BET、VSM、TGA 和 EDS 等技术对合成的纳米催化剂的结构性能进行了表征和分析。Fe 3 O 4 @FSM-16-SO 3 /IL 被用作可回收且高效的纳米催化剂,用于合成聚氢喹啉衍生物。磁性纳米催化剂表现出显着的稳定性和可重复使用性,连续重复使用六次而活性没有明显损失。