GB1287793A - Process for the preparation of 2-hydroxy-3-substituted cyclopent-2-en-1-ones and intermediates therefore - Google Patents

Process for the preparation of 2-hydroxy-3-substituted cyclopent-2-en-1-ones and intermediates therefore

Info

Publication number
GB1287793A
GB1287793A GB8917/71A GB891771A GB1287793A GB 1287793 A GB1287793 A GB 1287793A GB 8917/71 A GB8917/71 A GB 8917/71A GB 891771 A GB891771 A GB 891771A GB 1287793 A GB1287793 A GB 1287793A
Authority
GB
United Kingdom
Prior art keywords
formula
compounds
preparation
alkali metal
hydroxy
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
GB8917/71A
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.)
Pfizer Inc
Original Assignee
Pfizer Inc
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 Pfizer Inc filed Critical Pfizer Inc
Publication of GB1287793A publication Critical patent/GB1287793A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B9/00—Essential oils; Perfumes
    • C11B9/0061—Essential oils; Perfumes compounds containing a six-membered aromatic ring not condensed with another ring
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
    • A23L27/20—Synthetic spices, flavouring agents or condiments
    • A23L27/203—Alicyclic compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/42—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by hydrolysis
    • C07C45/43—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by hydrolysis of >CX2 groups, X being halogen
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B9/00—Essential oils; Perfumes
    • C11B9/0026—Essential oils; Perfumes compounds containing an alicyclic ring not condensed with another ring
    • C11B9/003—Essential oils; Perfumes compounds containing an alicyclic ring not condensed with another ring the ring containing less than six carbon atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Nutrition Science (AREA)
  • Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Seasonings (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Confectionery (AREA)
  • Cereal-Derived Products (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
  • Dairy Products (AREA)

Abstract

1287793 2 - Hydroxy - 3 - alkylcyclopent - 2- on-1-ones and intermediates therefor PFIZER Inc 31 Oct 1969 [10 Feb 1969 28 April 1969] 8917/71 Divided out of 1287792 Heading C2C The invention comprises compounds of the formula wherein both Xs are either Br or C1, lower alkoxy contains from 1 to 5 C atoms, and R is C 1 to C 6 alkyl, benzyl or substituted benzyl. They may be obtained by treating an alkali metal salt of 2 - carbo - (C 1 -C 5 ) - alkoxycyclopentan - 1- one with a (C 1 -C 6 ) alkyl halide or benzyl halide in the absence or presence of an alkali metal iodide and chlorinating or brominating the resulting compound by treating it with elemental Br 2 or Cl 2 , or sulphuryl chloride or bromide, The invention also comprises the preparation of compounds of the formula by hydrolysis of a compound of Formula II. Examples are given for the preparation of compounds of Formulµ I and II. The compounds of Formula I are useful as food additives. The alkali metal salt of 2-carbo-(C 1 -C 5 ) alkoxy-cyclopentan-1-one may be obtained by adding a dialkyladipate to a slurry of a base in an anhydrous inert solvent and distilling the mixture.
GB8917/71A 1969-02-10 1969-10-31 Process for the preparation of 2-hydroxy-3-substituted cyclopent-2-en-1-ones and intermediates therefore Expired GB1287793A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79811369A 1969-02-10 1969-02-10
US82001369A 1969-04-28 1969-04-28

Publications (1)

Publication Number Publication Date
GB1287793A true GB1287793A (en) 1972-09-06

Family

ID=27121960

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8917/71A Expired GB1287793A (en) 1969-02-10 1969-10-31 Process for the preparation of 2-hydroxy-3-substituted cyclopent-2-en-1-ones and intermediates therefore
GB53633/69A Expired GB1287792A (en) 1969-02-10 1969-10-31 2-hydroxy-3-lower alkyl-cyclopent-2-en-1-one preparation, including intermediates therefor

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB53633/69A Expired GB1287792A (en) 1969-02-10 1969-10-31 2-hydroxy-3-lower alkyl-cyclopent-2-en-1-one preparation, including intermediates therefor

Country Status (7)

Country Link
JP (1) JPS5037264B1 (en)
BE (1) BE745666A (en)
CH (1) CH515869A (en)
DE (1) DE2005160C3 (en)
FR (1) FR2032835A5 (en)
GB (2) GB1287793A (en)
IT (1) IT1004006B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3264304D1 (en) * 1981-11-27 1985-07-25 Firmenich & Cie Use of 2-hydroxy-3,4,4-trimethyl-cyclopent-2-ene-1-one as odorant ingredient

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB979295A (en) * 1960-11-28 1965-01-01 Shell Res Ltd The preparation of cyclic diketones

Also Published As

Publication number Publication date
DE2005160A1 (en) 1970-09-03
DE2005160C3 (en) 1981-10-01
FR2032835A5 (en) 1970-11-27
IT1004006B (en) 1976-07-10
CH515869A (en) 1971-11-30
DE2005160B2 (en) 1981-02-19
JPS5037264B1 (en) 1975-12-01
GB1287792A (en) 1972-09-06
BE745666A (en) 1970-08-10

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years