methoxy(-) Chem.
(mɛˈθɒksɪ)
[f. methoxyl (cf. hydroxy-).]
a. As an inseparable formative element in chem. names, indicating the presence of a methoxyl group, as methoxy-acetophenone, methoxy-benzoic adj., methoxy-pyridine, methoxy-succinic adj.; meˈthoxychlor, a crystalline compound, (C6H4OCH3)2CHCCl3, of similar chemical structure to DDT, which is used as an insecticide, esp. for veterinary hygiene.
| 1942 Fuson & Snyder Org. Chem. xxi. 288 A remarkable instance of catalysis has been observed in the formation of p-methoxyacetophenone from anisole by treatment with acetic anhydride 1964 N. G. Clark Mod. Org. Chem. xxiii. 479 Like the aromatic aldehydes, the ketones are frequently employed as synthetic intermediates, and as ingredients in perfumery. Some simple derivatives possess quite delightful odours, for example, p-methylacetophenone (hawthorn), p-methoxyacetophenone (heliotrope). |
| 1895 Perkin & Kipping Org. Chem. II. xxvi. 397 The methylcresols..are oxidised by chromic acid, yielding the corresponding methoxybenzoic acids, C6H4(OCH3)·COOH. |
| 1949 Jrnl. Econ. Entomol. XLII. 845/1 Ellenville line flies exhibited resistance to residues of both DDT and methoxychlor. 1959 H. Martin Sci. Princ. Crop Protection (ed. 4) x. 203 When methoxychlor was used instead [of DDT], Carter et al. were unable to detect the insecticide in the milk. 1969 K. A. Hassall World Crop Protection II. iv. 88 Methoxychlor..shows a lower tendency than DDT to dissolve in animal fats and also possesses a much lower acute oral toxicity to higher animals. It is therefore used on and near livestock. 1973 Globe & Mail (Toronto) 8 Sept. 8/3 City golf courses and cemeteries were relatively mosquito-free, having been fogged all along with methoxychlor, a new insecticide that doesn't have the harmful properties of DDT. |
| 1889 G. M'Gowan tr. Bernthsen's Text-bk. Org. Chem. 486 Methoxy-pyridine and methyl-pyridone, which result from these two forms by exchange of H..for CH3, are known. |
| 1893 Jrnl. Chem. Soc. LXIII. 229 Inactive methoxy⁓succinic acid may be resolved into two active acids, of equal and opposite rotatory powers. |
b. As an independent word,
usu. attrib. and sometimes joined by a hyphen to the second element:
= methoxyl.
| 1900 Perkin & Kipping Org. Chem. (rev. ed.) xxxiii. 485 By far the greater number of alkaloids contain one or two, sometimes three or more, methoxy-groups.., united with a benzene nucleus. 1946 Jrnl. Pharmacol. & Exper. Therap. LXXXVIII. 413 Substitution of chlorine by a..methoxy, butoxy or amyloxy group yields ineffective compounds. 1969 Times 10 Feb. 10/8 Dr. Shulgin..prepared many derivatives of mescalin, differing from the parent compound in their pattern of methoxy substitution on the phenyl ring. 1971 Nomencl. Org. Chem. (I.U.P.A.C.) (ed. 2) C. 154 The following contractions for oxygen-containing radical names are recommended... Methoxy CH3{b1}O{b1}. |