Solvent-free, highly efficient one-pot multi-component synthesis of 1-amido- and 1-carbamato-alkyl naphthols/phenols catalyzed by ethylammonium nitrate as reusable ionic liquid under neat reaction condition at ambient temperature
作者:Shafeek A.R. Mulla、Tarek A. Salama、Mohsinkhan Y. Pathan、Suleman M. Inamdar、Santosh S. Chavan
DOI:10.1016/j.tetlet.2012.12.004
日期:2013.2
developed for the efficient synthesis of 1-amido- and 1-carbamato-alkyl naphthols/phenols in excellent yields via one-pot three-component condensation of various aldehydes, amides/carbamates/urea, and naphthols/phenols using ethylammonium nitrate (EAN) as a reusable ionic liquid catalyst under neat reaction condition at ambient temperature.
An efficient and direct procedure for the synthesis of amidoalkyl naphthols has been described that employs a three-component condensation reaction in one pot using aromatic aldehydes, β-naphthol and ureas or amides in the presence of p-toluene sulfonic acid in 1,2-dichloroethane at room temperature or undersolvent-freeconditions at elevated temperature.
labelled supportedionicliquidphase (SILP) catalystcontaining l-prolinate anion has been synthesized by anion metathesis reactions of ionicliquid like unit grafted on Merrifield resin. The multi-component synthesis of 1-amidoalkyl-2-naphthols from 2-naphthol, aryl aldehydes and amides has been effectively achieved under solvent-free conditions using SILP catalyst. Additionally, the catalyst could
Green and one-pot synthesis of novel amidoalkyl naphthols using triethanolammonium acetate [(OHCH2CH2)3NH][OAc]) ionic liquid and their anti-H.pylori activity
one-pot synthesis of amidoalkyl naphthol derivatives and their in vitro anti-Helicobacter pylori activity are reported. The reaction proceeds via multi-component condensation of 2-naphthol, (hetero) aromatic aldehydes and urea/thiourea/acetamide/2-aminothiazole/4-nitrothiazol-2-amine/2-aminopyridine under solvent-free condition. This protocol includes some salient features, such as using triethanolammonium
series of N-(furan/thiophene/pyrrole-2-yl-(2-hydroxynaphthalen-1-yl)methyl) acetamide derivatives 4 has been depicted by one-pot three-component synthesis using 2- naphthol 1 with aldehydes 2 and amides 3 in the presence of DBU as a catalyst in ethanol as solvent under reflux condition for 110-120 min. This method has the advantages of good yields, being environmentally friendly, straightforward protocol