GB1199351A

GB1199351A – Improvements in the Preparation of Nitroxides
– Google Patents

GB1199351A – Improvements in the Preparation of Nitroxides
– Google Patents
Improvements in the Preparation of Nitroxides

Info

Publication number
GB1199351A

GB1199351A
GB1083668A
GB1083668A
GB1199351A
GB 1199351 A
GB1199351 A
GB 1199351A
GB 1083668 A
GB1083668 A
GB 1083668A
GB 1083668 A
GB1083668 A
GB 1083668A
GB 1199351 A
GB1199351 A
GB 1199351A
Authority
GB
United Kingdom
Prior art keywords
amine
nitroxides
preparation
oxyl
oxidizing
Prior art date
1968-03-06
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
GB1083668A
Inventor
Donald Peter Young
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.)

BP Chemicals Ltd

BP Chemicals UK Ltd

Original Assignee
BP Chemicals Ltd
BP Chemicals UK Ltd
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.)
1968-03-06
Filing date
1968-03-06
Publication date
1970-07-22

1968-03-06
Application filed by BP Chemicals Ltd, BP Chemicals UK Ltd
filed
Critical
BP Chemicals Ltd

1968-03-06
Priority to GB1083668A
priority
Critical
patent/GB1199351A/en

1970-07-22
Publication of GB1199351A
publication
Critical
patent/GB1199351A/en

Status
Expired
legal-status
Critical
Current

Links

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Global Dossier

Discuss

Classifications

C—CHEMISTRY; METALLURGY

C07—ORGANIC CHEMISTRY

C07D—HETEROCYCLIC COMPOUNDS

C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms

C07D295/22—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with hetero atoms directly attached to ring nitrogen atoms

C07D295/24—Oxygen atoms

Abstract

1,199,351. Preparation of nitroxides. BP CHEMICALS (U.K.) Ltd. 12 Feb., 1969 [6 March, 1968], No. 10836/68. Heading C2C. Nitroxides of the general formulµ wherein R1-R6 represent the same or different alkyl groups and n is from 1 to 17, are prepared by oxidizing the corresponding amine to the N-hydroxy amine by reaction with aqueous hydrogen peroxide in the presence of permolybdic or pertungstic acid or a salt thereof as catalyst, and subsequently oxidizing the N- hydroxy amine to the corresponding nitroxide by means of another oxidizing agent, e.g. molecular oxygen or ferricyanide ion. The primary oxidation is preferably performed at room temperature using 1-1À5 moles H 2 O 2 / mole amine and the aqueous solution contains a small amount of sodium ethylenediamine tetraacetate. The resulting reaction mixture is preferably heated to a temperature up to 100‹ C. and then cooled before carrying out the second oxidation step. Examples detail the preparation of 2,2,6,6 – tetramethylpiperidine – 1 – oxyl, 2,2,5,5 – tetramethylpyrrolidine – 1 – oxyl, and t.-butyl t.-pentyl nitroxide.

GB1083668A
1968-03-06
1968-03-06
Improvements in the Preparation of Nitroxides

Expired

GB1199351A
(en)

Priority Applications (1)

Application Number
Priority Date
Filing Date
Title

GB1083668A

GB1199351A
(en)

1968-03-06
1968-03-06
Improvements in the Preparation of Nitroxides

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB1083668A

GB1199351A
(en)

1968-03-06
1968-03-06
Improvements in the Preparation of Nitroxides

Publications (1)

Publication Number
Publication Date

GB1199351A
true

GB1199351A
(en)

1970-07-22

Family
ID=9975219
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB1083668A
Expired

GB1199351A
(en)

1968-03-06
1968-03-06
Improvements in the Preparation of Nitroxides

Country Status (1)

Country
Link

GB
(1)

GB1199351A
(en)

Cited By (8)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0488403A2
(en)

*

1990-11-30
1992-06-03
GREAT LAKES CHEMICAL ITALIA S.r.l.
Process for the preparation of nitroxyl radicals of sterically hindered amines

NL1000396C2
(en)

*

1995-05-18
1996-11-19
Avebe Coop Verkoop Prod

Method for the recovery or recirculation of stable nitroxide radicals.

US5728872A
(en)

*

1994-06-27
1998-03-17
Lutz Riemenschneider
Stabilized acrylic acid compositions

EP0866060A2
(en)

*

1997-03-18
1998-09-23
Hüls Aktiengesellschaft
Process for the preparation of 1,2,3,6-tetrahydro-2,2,6,6,-tetramethylpyridin-N-oxyl

US5998661A
(en)

*

1998-06-15
1999-12-07
The United States Of America As Represented By The Secretary Of The Army
Preparations of organic nitro compounds through mixed oxidizing agents

US6255448B1
(en)

1995-02-07
2001-07-03
Atofina
Polymerization in the presence of a β-substituted nitroxide radical

US6262179B1
(en)

1995-02-07
2001-07-17
Atofina
Process for the manufacture of a composition comprising a vinylaromatic polymer and a rubber by polymerization in the presence of a stable free radical

US6538141B1
(en)

*

1999-01-08
2003-03-25
Atofina
Method for preparing nitroxides

1968

1968-03-06
GB
GB1083668A
patent/GB1199351A/en
not_active
Expired

Cited By (12)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

EP0488403A2
(en)

*

1990-11-30
1992-06-03
GREAT LAKES CHEMICAL ITALIA S.r.l.
Process for the preparation of nitroxyl radicals of sterically hindered amines

EP0488403A3
(en)

*

1990-11-30
1992-09-23
Enichem Synthesis S.P.A.
Process for the preparation of nitroxyl radicals of sterically hindered amines

US5728872A
(en)

*

1994-06-27
1998-03-17
Lutz Riemenschneider
Stabilized acrylic acid compositions

US6255448B1
(en)

1995-02-07
2001-07-03
Atofina
Polymerization in the presence of a β-substituted nitroxide radical

US6262179B1
(en)

1995-02-07
2001-07-17
Atofina
Process for the manufacture of a composition comprising a vinylaromatic polymer and a rubber by polymerization in the presence of a stable free radical

NL1000396C2
(en)

*

1995-05-18
1996-11-19
Avebe Coop Verkoop Prod

Method for the recovery or recirculation of stable nitroxide radicals.

WO1996036621A1
(en)

*

1995-05-18
1996-11-21
Coöperatieve Verkoop- En Produktievereniging Van Aardappelmeel En Derivaten Avebe B.A.
Method for recovering or recirculating stable nitroxide radicals

EP0866060A2
(en)

*

1997-03-18
1998-09-23
Hüls Aktiengesellschaft
Process for the preparation of 1,2,3,6-tetrahydro-2,2,6,6,-tetramethylpyridin-N-oxyl

EP0866060A3
(en)

*

1997-03-18
1998-10-21
Hüls Aktiengesellschaft
Process for the preparation of 1,2,3,6-tetrahydro-2,2,6,6,-tetramethylpyridin-N-oxyl

US6452016B1
(en)

1997-03-18
2002-09-17
Degussa-Huels Aktiengesellschaft
Process for the preparation of 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyridine N-oxide

US5998661A
(en)

*

1998-06-15
1999-12-07
The United States Of America As Represented By The Secretary Of The Army
Preparations of organic nitro compounds through mixed oxidizing agents

US6538141B1
(en)

*

1999-01-08
2003-03-25
Atofina
Method for preparing nitroxides

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Legal Events

Date
Code
Title
Description

1970-12-02
PS
Patent sealed

1983-09-28
PCNP
Patent ceased through non-payment of renewal fee

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