The efficient one‐pot syntheses of Bettibases by the three‐component reaction of aromatic aldehyde, 2‐naphthalen, and acetonitrile (or benzamide) catalyzed by 1‐methyl‐3‐(2‐(sulfooxy)ethyl)‐1H‐imidazol‐3‐ium chloride is reported. The solvent can be recycled easily.
Brønsted acidic ionic liquid as an efficient and reusable catalyst for one-pot synthesis of 1-amidoalkyl 2-naphthols under solvent-free conditions
作者:Abdol R. Hajipour、Yosof Ghayeb、Nafisehsadat Sheikhan、Arnold E. Ruoho
DOI:10.1016/j.tetlet.2009.07.116
日期:2009.10
amidoalkyl naphthols from condensation of aldehydes with amides or urea and 2-naphthol in the presence of a catalytic amount of Brønstedacidicionicliquid ([TEBSA][HSO4]) under thermal solvent-free conditions. High yields, short reaction time, easy work-up and reusability of the catalyst are advantages of this procedure.
Chitosan-SO<sub>3</sub>H (CTSA) an efficient and biodegradable polymeric catalyst for the synthesis of 4,4′-(arylmethylene)bis(1<i>H</i>-pyrazol-5-ol) and α-amidoalkyl-β-naphthol’s
作者:Paresh G. Patil、Suman Sehlangia、Dhananjay H. More
DOI:10.1080/00397911.2020.1753078
日期:2020.6.2
Abstract An efficient, green procedure for the synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) and α-amidoalkyl-β-naphthol’s using biodegradable polymeric catalyst chitosan-SO3H (CTSA), is operationally easy to prepare by mixing chitosan and chlorosulfonic acid. This catalyst displays excellent catalytic activity and reusable for five subsequent reactions without significant loss of catalytic
An efficient and entirely green protocol for preparation of 1-amidoalkyl-2-naphthols employing a multicomponent one-pot condensation reaction of 2-naphthol, amides or urea, and aromatic aldehydes in the presence of maltose under solvent-free conditions is described. The present approach of this methodology offers several advantages such as mild conditions, high yields, clean reaction profiles, operational simplicity, and environmentally benign and simple work-up procedures.
Preparation and characterization of nano‐Co‐[4‐chlorophenyl‐salicylaldimine‐methyl pyranopyrazole]Cl<sub>2</sub>as a new Schiff base complex and catalyst for the solvent‐free synthesis of 1‐amidoalkyl‐2‐naphthols
By the reaction of 4‐chlorobenzaldehyde with ethyl acetoacetate, malononitrile, and hydrazine hydrate, 6‐amino‐4‐(4‐chlorophenyl)‐3‐methyl‐2,4‐dihydropyrano[2,3‐c]pyrazole‐5‐carbonitrile was prepared and then reacted with salicylaldehyde and CoCl2·6H2O to produce nano‐Co‐[4‐cholorophenyl‐salicylaldimine‐methylpyranopyrazole]Cl2 (nano‐[Co‐4CSMP]Cl2). The prepared nano‐Schiff base complex was reported