Abstract
Macrocyclic diamides were synthesized by condensation of bridged 1,7-bis(2-aminophenyl)-1,7-dioxaheptanes that contain an additional donor oxygen or nitrogen atom in the bridge with glutaric, diglycolic, and N-tosyliminodiacetic acid dichlorides under high-dilution conditions. Subsequent reduction with boron hydride leads to 18-membered dibenzodiaza-crown-4-6 compounds. The structural assigments were made using the IR, 1H and 13C NMR, and mass spectra.
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