β Scribed by S. KUMAR; S. H. MASHRAQUI
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Synthesis of Crown Analogues Derived from Bisnaphthol.
-Bisnaphthol (I) undergoes cyclocondensation with tosylates (II) under phasetransfer catalysis conditions to yield the hitherto unknown dinaphthano crowns (III). Macrocyclization of bisnaphthol (I) with xylylene dibromides affords 3:3 condensed macrocycles [cf. (V)] whose structures are supported by elemental analysis,
π SIMILAR VOLUMES
The Synthesis of Anthracene Crown Ethers Derived from Benzo-Crown Ethers. -A method to obtain anthracene crown ethers starting from benzo-15-crown-5-ether and benzo-18-crown-6-ether and various aldehydes is described. The yield strictly depends on the aldehyde. Cyclohexanone leads to a new class of
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