Akceylan, EzgiYılmaz, Mustafa2020-03-262020-03-2620110040-4020https://dx.doi.org/10.1016/j.tet.2011.06.050https://hdl.handle.net/20.500.12395/26869This study reports the synthesis of calix[4]arene-based phase-transfer catalysts derived from the reaction of 5,17-di-tert-butyl-25,27,26,28-tetrahydroxycalix[4]arene with N-ethylpiperazine, diallylamine or 4-benzylpiperidine. The catalytic efficiency of the calix[4]arenes alkylamine derivatives was evaluated by carrying out the ester-forming reaction of alkali metal carboxylates (sodium butyrate or sodium caprylate) with p-nitrobenzyl bromide. It has been observed that the ester-forming reaction of alkali metal carboxylates with p-nitrobenzyl bromide, using the N-ethylpiperazine amine derivative of calix[4]arene as a phase-transfer catalyst in dichloromethane at 25 degrees C, provided the best yields. (C) 2011 Elsevier Ltd. All rights reserved.en10.1016/j.tet.2011.06.050info:eu-repo/semantics/closedAccessCalix[4]arenePhase transferCatalysisEsterificationArticle673462406245Q2WOS:000293493900018Q2