Abstract
The authors report a synthesis of tert-butylcalix[4]arenes with pendant diynyl groups (1). When 1 was exposed to UV radiation, no significant transformation took place. When hydroxyl groups were converted into urethanes (2 and 3), the compound exhibited color change from white to intense red upon a five-minute exposure to UV radiation. The authors exposed 2 to γ-radiation in order to achieve a more thorough transformation of the solid material. The resulting solid material was shown to have spectroscopic properties which suggest the presence of ene-yne conjugation of the expected product, 4.
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