1987
DOI: 10.1002/chin.198714248
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F. A. NEUGEBAUER,
H. FISCHER

Abstract: Abstract 248ChemInform Abstract The tetraazaparacyclophanes (III) are synthesized in a three-step reaction sequence from the diacid dichlorides (I) which are cyclized with hydrazine to give the diketodiazaparacyclophane (II). The compounds (III) exist as chair and boat conformers; the boat form is energetically favoured. Transannular interaction is responsible for a hypsochromic shift of the n→ π* absorption in (III). (UV-, 1H-NMR-, MS-data).

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