Analytical and spectral data of 1,3-oxazin-6-one 8

Analytical and spectral data of 1,3-oxazin-6-one 8Analytical and spectral data of the 1,3-oxazin-6-one 8.

M.P. 128 °C (yellow prisms from ether).

IR (Nujol): n = 2127, 1759, 1616, 1540, 1492, 1123 cm^-1.

¹H NMR (CDCl₃): d = 6.25 (d, 1H, J = 6.8 Hz), 7.22 (ddd, 1H, J = 8.1, 8.0, 1.2 Hz), 7.30 (dd, 1H, J = 8.1, 1.2 Hz), 7.59 (ddd, 1H, J = 8.1, 8.0, 1.5 Hz), 7.87 (d, 1H, J = 6.85 Hz), 7.95 (dd, 1H, J = 8.1, 1.5 Hz).

¹³C NMR (CDCl₃): d = 109.90, 120.04, 121.91 (s), 124.87, 131.83, 133.72, 140.00 (s), 154.25, 158.14 (s), 163.73 (s).

Mass spectrum m/z (%) 214 (M⁺, 48), 186 (100).

Anal. Calcd. for C₁₀H₆N₄O₂: C, 56.08; H, 2.82; N, 26.16; Found: C, 56.32; H, 3.09; N, 26.35.

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