No abstract

Several aromatic bridged cryptophanes were successfully synthesized. p-Xylene bridged cryptophane Anti-3 was prepared by the direct trimerization of ci,ci'-bis[4-hydroxyme thyl-2-methoxyphenoxy]-p-xylene. The synthesis of o-xylene bridged cryptophane Anti4 was carried out by the direct trimerization and/or the stepwise method from vanillyl alcohol. The 0-[4,5-bis-(methoxycarbonyl)]xylene bridged cryptophanes Anti-15a and Syn-15b were also prepared by the stepwise method from vanillyl alcohol. Anti-3 was capable of complexing with almost all the quaternary alkylammonium cations among the primary, secondary, tertiary and quaternary ammonium cations, and selectively prefered to complex with the NEt,Me+ cation as a guest. From the complexation of the o-xylene bridged cryptophanes Anti-8, and the analogs Anti15a and Syn-15b with the NMe,+ cation, the cryptophanes Anti-8 and Syn-15b were confirmed to complex with the guest cation, however, Anti-15a was not confirmed to be included.

Extraction abilities of cyclotriveratrylene crown ethers (2) toward alkali, alkaline earth, and other metal ions were examined. Transport of metal ions by 2 through a liquid membrane was also examined.

Die 4‐Alkyl‐1‐methyl‐pyridinium‐jodide (Ia), (Ib) geben mit p‐Methoxybenzylmagnesiumchlorid (II) die Addukte (IIIa), (IIIb), aus denen mit Natriumboranat die beiden isomeren Reduktionsprodukte (IV) und (V) gebildet werden.