12-09638. η-Tocopherol [Archived]
Nomenclature
CAS number: 91-86-1
3,4-Dihydro-2,7-dimethyl-2-(4,8,12-trimethyltridecyl)-2H-1-benzopyran-6-ol; 2,7-dimethyl-2-(4,8,12-trimethyltridecyl)-6-chromanol; 7-methyltocol. C27H46O2; mol wt 402.65.
C 80.54%, H 11.52%, O 7.95%.
Description and references
Isolation from rice: Green, Marcinkiewicz, Nature 177, 86 (1956). Synthesis: McHale et al., J. Chem. Soc. 1958, 1600; Green et al., ibid. 1959, 3374; Marcinkiewicz et al., ibid. 3377.
Properties
Pale yellow oil. uv max (ethanol): 298 nm (E1%1cm 104.1).Derivative
4-Phenylazobenzoate.C40H54N2O3; mol wt 610.87.
C 78.65%, H 8.91%, N 4.59%, O 7.86%.
Properties
Crystals from 2-propanol, mp 55-56°.Derivative
3′,5′-Dinitrophenylurethane.C34H49N3O7; mol wt 611.77.
C 66.75%, H 8.07%, N 6.87%, O 18.31%.
Properties
Crystals from ethanol + water, mp 115-117°.Derivative
p-Nitrophenylurethane.C34H50N2O5; mol wt 566.77.
C 72.05%, H 8.89%, N 4.94%, O 14.11%.
Properties
Crystals from methanol, mp 112°.Status
This monograph has been retired and is no longer subject to revision or update.