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Properties of substance:

7,9-di-tert-butyl-1-oxaspiro[4,5]deca-6,9-diene-2,8-dione

Group of substances:

organic

Empirical formula (Hill's system for organic substances):

C17H24O3

Molar/atomic mass: 276.3707

Melting point (°C):

139-140

Synthesis 1:

Reference: Bulletin of the Academy of Sciences of the USSR, Division of chemical science. - 1982. - Vol. 31, No. 7 pp. 1419

A sample of 10 g (0,175 mole) KOH in 25 ml water was added to 33 g (0.11 mole) methyl 4-hydroxy-3,5-di-tert-butylphenylpropionate in 250 ml ethanol and oxygen was introduced for 8 h at 40-45~ After treatment analogous to the above and crystallization from hexane, we obtained 22.8 g (65%) 6,8-di-tert-butylspiro(4,5)deca-1-oxa-5,8-diene-2,7-dione, with m.p. 139-140 C. UV spectrum: max 236 nm, log e 4.10. IR spectrum (CC14, v, cm-1): 1655, 1675, 1795 (CO). PMR spectrum (CCl4, ppm, 60 MHz): 1.25 s (18H), 6.58 s (2H), 2.49 m (4H).

References:

  1. Bulletin of the Academy of Sciences of the USSR, Division of chemical science. - 1982. - Vol. 31, No. 7. - pp. 1418-1419
  2. Environmental Science and Pollution Research. - 2018. - Vol. 25, No. 31. - pp. 31043

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru