酸性功能化离子液体催化“一锅法”合成酰胺烷基萘酚

用磺酸型离子液体1-甲基-3-磺酸丙基咪唑硫酸氢盐([MIMPS][HSO₄])催化β-萘酚、芳香醛和酰胺（或脲）3组分“一锅法” 类Ritter反应合成了酰胺烷基萘酚。 投料比为n(β-萘酚)∶n(芳香醛)∶n(酰胺或脲)∶n([MIMPS][HSO₄])=1∶1∶1.3∶0.1,无需溶剂,恒温125 ℃反应5～40 min,通过简单水洗抽滤即可分离产物,酰胺烷基萘酚产率为85%～97%。 离子液体[MIMPS][HSO₄]可回收重复使用4次,其催化活性无明显降低。 探讨了醛、酰胺或脲结构对反应的影响及可能的反应机理。     

磷钼酸：一种有效的催化三组分反应合成1-酰胺烷基-2-萘酚的Keggin型杂多酸

磷钼酸,一种环境友好的杂多酸催化剂,可以有效地催化2-萘酚、脲或酰胺和醛的三组分“一锅”反应生成1-酰胺烷基-2-萘酚。该方法得率高,操作简单。     

无溶剂条件下"一锅法"催化合成胺基烷基萘酚衍生物

无溶剂条件下,邻甲基苯磺酸铜可有效催化2-萘酚、醛和胺三组分"一锅法"合成胺基烷基萘酚衍生物.考察了溶剂条件及催化剂用量对产率的影响.经催化剂循环研究,该催化剂重复使用4次仍保持较高活性.产物的结构通过熔点,IR,1HNMR,13CNMR,质谱和元素分析进行测定和结构表征.同时给出了该反应可能的反应机理.     

Environmentally Friendly Preparation of Amidoalkyl Naphthols

A new, facile, and cost-effective process involving the solvent-free synthesis of amidoalkyl naphthols using a three-component, one-pot condensation reaction of β-naphthol, aromatic aldehyde, and amides in the presence of Al(H₂PO₄)₃ as heterogeneous catalyst under thermal conditions and microwave irradiation has been described. This new approach has the advantage of consistently excellent yields and short reaction times. The catalyst has shown a very stable catalytic activity in the reaction conditions and also can be recovered and recycled.     

Indium(III) Chloride: An Efficient Catalyst for the Synthesis of Amidoalkyl Naphthols

Indium chloride was found to be a very efficient catalyst for the synthesis of amidoalkyl naphthols from β-naphthol, aromatic aldehydes, and acetamide/urea under solvent-free conditions using microwave irradiation.     

Silica Supported Methanesulfonic Acid as an Efficient and Reusable Heterogeneous Catalyst for the Synthesis of Amidoalkyl Naphthols

A green protocol for the preparation of amidoalkyl naphthols from three‐component one‐pot condensation of 2‐naphthol, aldehydes, amides or urea in the presence of silica supported methanesulfonic acid under thermal solvent‐free conditions has been described. The catalyst is stable, efficient, easily prepared, and reusable. The remarkable features of this methodology are short reaction time, excellent yields, simple experimental and work‐up procedures.     

Cation‐Exchanged Resins: Efficient Heterogeneous Catalysts for Facile Synthesis of 1‐Amidoalkyl‐2‐naphthols from One‐Pot,Three‐Component Condensations of Amides/Ureas,Aldehydes, and 2‐Naphthol

One‐pot, three‐component condensation of 2‐naphthol, amides/ureas, and aldehydes takes place smoothly in the presence of cation‐exchange resins to afford the corresponding 1‐amidoalkyl‐2‐naphthols in good yield. Indion‐130 is found to be the best catalyst for the reaction and is recyclable. The method is simple, solvent free, and involves a short reaction time.     

聚合物负载磺酸催化的三组分反应合成1-酰胺烷基-2-萘酚

聚合物负载磺酸，一种环境友好的固体酸催化剂，可以有效地催化2-萘酚、脲或酰胺和醛的三组分“一锅”反应生成1-酰胺烷基-2-萘酚。该方法得率高，操作简单。     

Multi‐wall carbon nanotube supported Co (II) Schiff base complex: an efficient and highly reusable catalyst for synthesis of 1‐amidoalkyl‐2‐naphthol and tetrahydrobenzo[b]pyran derivatives

An immobilized Co (II) Schiff base complex supported on multi‐wall carbon nanotubes was synthesized and characterized using Fourier transform infrared spectroscopy, X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy , thermogravimetric analysis and inductively coupled plasma mass spectrometry. It was shown that the supported complex is a facile, eco‐friendly, recyclable, reusable and green catalyst for three‐component condensation of 2‐naphthol and acetamide with various aldehydes for the synthesis of 1‐amidoalkyl‐2‐naphthol derivatives under solvent‐free conditions. Also, in a further study, the catalytic application was studied in the synthesis of tetrahydrobenzo[b ]pyran derivatives via the condensation reaction of malononitrile and dimedone with several aromatic aldehydes. The procedures suggested here for the synthesis of 1‐amidoalkyl‐2‐naphthol and tetrahydrobenzo[b ]pyran derivatives offer several advantages, such as stability, recyclability and eco‐friendliness of the catalyst, simple experimental conditions, short reaction times, high to excellent yields and easy work‐up.     

Solvent‐Free One‐Pot Synthesis of Amidoalkyl Naphthols Catalyzed by Silica Sulfuric Acid

An efficient, inexpensive, and mild method for the synthesis of amidoalkyl naphthols, catalyzed by ‘silica sulfuric acid’ (SSA), was elaborated under solvent‐free conditions at room temperature. Various amidoalkyl naphthols were synthesized in high yields from aromatic or aliphatic aldehydes, α‐ or β‐naphthols, and amides or urea or thiourea.