The barium(II)-ion assisted monodeacetylation of p-cone calix[4]arene-crown-5 diacetate 4 in MeO–/MeOH is a fast and convenient method for the selective preparation of p-cone calix[4]arene-crown-5 monoacetate 5. which is not readily accessible by direct acetylation of the parent bis-phenolic compound.
R. Cacciapaglia, A. Casnati, L. Mandolini, S. Schiavone and R. Ungaro, J. Chem. Soc., Perkin Trans. 2, 1993, 369 DOI: 10.1039/P29930000369
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