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).

The condensation of (benzo-15-crown-5

No abstract

No abstract

The acylation of dibenzo-18-crown-6 by lithium, sodium, and potassium acetates in polyphosphoric acid was studied. Complexes of dibenzo-18-crown-6 with the acetates were obtained. A new method is proposed for the production of mono-and diacetyldibenzo-18-crown-6 by the reaction of dibenzo-18crown-6 complexes with metal acetates in polyphosphoric acid.