GB1269732A - N-oxy-4,5-dihydroimidazole compounds - Google Patents

N-oxy-4,5-dihydroimidazole compounds

Info

Publication number
GB1269732A
GB1269732A GB2994269A GB2994269A GB1269732A GB 1269732 A GB1269732 A GB 1269732A GB 2994269 A GB2994269 A GB 2994269A GB 2994269 A GB2994269 A GB 2994269A GB 1269732 A GB1269732 A GB 1269732A
Authority
GB
United Kingdom
Prior art keywords
formula
acid
imidazole
lead dioxide
nitrone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2994269A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SYNTEX ENERGY RES Inc
VARIAN ENERGY
Original Assignee
SYNTEX ENERGY RES Inc
VARIAN ENERGY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SYNTEX ENERGY RES Inc, VARIAN ENERGY filed Critical SYNTEX ENERGY RES Inc
Publication of GB1269732A publication Critical patent/GB1269732A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/04—Control arrangements
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms

Abstract

1,269,732. Imidazoline nitroxides. SYNTEX ENERGY RESEARCH Inc., and VARIAN ENERGY. 12 June, 1969 [15 Aug., 1968], No. 29942/69. Heading C2C. Novel free radicals of the formula in which R<SP>1-4</SP> are each C 1-12 alkyl, alkenyl, alkynyl, aryl or aralkyl groups or R<SP>1</SP> and R<SP>2</SP> or R<SP>3</SP> and R<SP>4</SP> together represent C 3-10 alkylene or alkenylene groups and R<SP>5</SP> is hydrogen, chlorine, bromine, iodine or a monovalent organic group, are prepared (1) by treating a nitrone, including its tautomer, of the formula with an oxidizing agent capable of oxidizing the nitrone, e.g. lead dioxide; a halogen, a peracid or lead tetra-acetate, (2) by reacting an imidazole of the formula with a reagent generating nitrous acid, e.g. an acid and a nitrite, or with lead dioxide and an acid in dimethylformamide as solvent or with a phosphorus reducing agent P(O n R) 3 , where n is 0 or 1-3 and R is alkyl or aryl, (3) reacting a diahydro-imidazole of the formula or a tetrahydro-imidazole of the formula with the nitrous acid or lead dioxide/acid/dimethylformamide type reagents. The preparation of 4,4,5,5 - tetramethyl - 4,5 - dihydro - 3- oxyimidazoles in which the 2-substituent is phenyl, methyl, bromomethyl, bromine, benzoyl, isopropyl or hydrogen is described.
GB2994269A 1968-08-15 1969-06-12 N-oxy-4,5-dihydroimidazole compounds Expired GB1269732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75274468A 1968-08-15 1968-08-15

Publications (1)

Publication Number Publication Date
GB1269732A true GB1269732A (en) 1972-04-06

Family

ID=25027639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2994269A Expired GB1269732A (en) 1968-08-15 1969-06-12 N-oxy-4,5-dihydroimidazole compounds

Country Status (5)

Country Link
BE (1) BE734495A (en)
DE (1) DE1941568A1 (en)
FR (1) FR2015691A1 (en)
GB (1) GB1269732A (en)
IT (1) IT1035019B (en)

Also Published As

Publication number Publication date
FR2015691A1 (en) 1970-04-30
IT1035019B (en) 1979-10-20
BE734495A (en) 1969-11-17
DE1941568A1 (en) 1970-02-19

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