From 1858 to 1861 methylated spirit was duty-free when it was required for manufacturing processes, and the methylation or "denaturizing" was carried out in accordance with a prescribed process.
It is apparently a tropidine monocarboxylic acid, for on exhaustive methylation it yields cycloheptatriene-I.
The potassium salt of the iso-diazo hydroxide yields on methylation a nitrogen ether, R N(CH 3) NO, whilst the silver salt yields an oxygen ether, R N: N OCH 3.
They behave, however, as tautomeric substances, since their alkali salts on methylation give nitrogen ethers, whilst their silver salts yield oxygen ethers: potassium salt - R N(CH 3).NO 2 nitramine.
Guaiacol may be obtained directly from beechwood tar, from pyrocatechin by methylation with potash and potassium methyl sulphate at 180°, or from anisol by nitration, reduction of the ortho-nitroanisol to amino-anisol, which is then diazotized and boiled with water.
It combines directly with methyl iodide to form dimethyl coninium iodide, C10H22NI, which by the destructive methylation process of A.
Blanc (Comptes rendus, 1903, 136, p. 1460), prepared hydrocarbons of the cyclo-pentane series from cyclo- hexane compounds by the exhaustive methylation process of A.
It is identical' with the hydrotropilidine, which results by the destructive methylation of tropane.
On oxidation it yields methyl granatic ester, which, by the exhaustive methylation process, is converted into homopiperylene dicarboxylic ester, HO 2 C CH :CH CH 2 CH 2 CH :C. H CO 2 H, from which suberic acid may be obtained on reduction.
By the electrolytic reduction of pseudopelletierine, N-methyl granatanine is obtained, and this by exhaustive methylation is converted into A O des-dimethyl granatanine.