One-pot three-component Mannich reaction in water catalyzed by eco-friendly, hydrophobic and recyclable sulfonic acid based nanosilica (SBA-15-Ph-PrSO3H)
Brønsted acidic ionic liquids of aza-crown ether complex cations: preparation and applications in organic reactions
作者:Chen Cheng、Huanwang Jing
DOI:10.1039/c4ra03061c
日期:——
of an aza-crownether chelated potassium cation and various anions, were designed, synthesized and characterised by FTIR, NMR and mass spectrometry, thermogravimetric differential thermal analysis (TG-DTA) and elemental analysis. These new Brønsted acidic ionic liquids of aza-crownether complex cations (aCBAILs) were applied as catalysts to the Biginelli reaction, Mannich reaction and synthesis of
A simple and efficient method has been developed for the one-pot Mannich reaction of β-amino carbonylcompounds from aromatic aldehydes, aromatic ketones and aromatic amines in the presence of a catalytic amount of bismuth trichloride.
Fe
<sub>3</sub>
O
<sub>4</sub>
@ZrO
<sub>2</sub>
/SO
<sub>4</sub>
<sup>2‐</sup>
: A recyclable magnetic heterogeneous nanocatalyst for synthesis of β‐amino carbonyl derivatives and synthesis of benzylamino coumarin derivatives through Mannich reaction
developed an effective protocol for the synthesis of β‐amino carbonyl compounds and synthesis of benzylamino coumarin derivativesthrough Mannich type reaction in high yields. Fe3O4@ZrO2/SO42‐ was employed as an effective heterogeneous nanocatalyst for the Mannich reaction. This research consists of two sections. In first section, β‐amino carbonyl derivatives were synthesized under solvent‐free condition
在当前的工作中,我们开发了一种有效的方案,用于通过Mannich型反应以高收率合成β-氨基羰基化合物和合成苄基氨基香豆素衍生物。Fe 3 O 4 @ZrO 2 / SO 4 2‐将其用作曼尼希反应的有效多相纳米催化剂。本研究分为两个部分。在第一部分中,在无溶剂条件下合成了β-氨基羰基衍生物。在另一部分中,在室温下合成苄氨基香豆素化合物。本方法具有许多优点,例如反应时间短,成本低,易于后处理,反应条件温和,收率高,催化剂的回收率和可重复使用性好,而活性没有明显损失。
Sulfonic acid supported on magnetic nanoparticle as an eco-friendly, durable and robust catalyst for the synthesis of β-amino carbonyl compounds through solvent free Mannich reaction
A simple, efficient and environmentally benign solid acid catalyst was prepared by anchoring a propyl sulfonic acid on the surface of silica‐coated magnetic nanoparticles by low cost precursors. The catalyst has been then engaged in the efficient β‐amino carbonyl compounds production via three component Mannich reaction under solvent free reaction condition at room temperature. After the completing
Choline-based biodegradable ionic liquid catalyst for Mannich-type reaction
作者:PENG HUAN、HU YULIN、XING RONG、FANG DONG
DOI:10.1007/s12039-016-1199-5
日期:2016.12
A three-component Mannich-typereaction of aromatic aldehydes, ketones, and amines was catalyzed by a novel choline-based acidic ionic liquid. The proposed catalyst was a Lewis-Brønsted dual acid catalyst as well as water-tolerant. The β-amino carbonyl compounds were obtained at room temperature in reasonable to good yields ranging from 63 to 98%. After the reaction, the catalyst could be recycled