Abstract
New spiropyrans of the 4-oxo-3,4-dihydro-2H-1,3-benzoxazine series, individual representatives of which have photochromic properties, were obtained by condensation of 2-alkyl-4-oxo-1,3-benzoxazinium perchlorates with aromatic o-hydroxy aldehydes in acetic acid and subsequent treatment of the 2-(o-hydroxystyryl) derivatives with pyridine or triethylamine. The structures of the synthesized compounds were confirmed by the PMR, IR, and UV spectroscopic data.
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See [1] for communication VI.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 161–166, February, 1978.
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Luk'yanov, B.S., Ryabukhin, Y.I., Dorofeenko, G.N. et al. Photochromic and thermochromic spirans. Chem Heterocycl Compd 14, 122–127 (1978). https://doi.org/10.1007/BF00945321
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DOI: https://doi.org/10.1007/BF00945321