200 ChemInform Abstract Alkylation of the benzo crown ethers (Ia) with the tertiary alcohols (IIa) and (IIb) gives the tert-alkyl derivatives (Ib), whereas with sec-butanol (IIc) the dialkylated compounds (Ic) and (Id) are obtained. The dibenzo crown ethers (III) give similar results. (IR-, NMR-, MS-data).
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