BR9809661A - Reduction of aromatic halides - Google Patents
Reduction of aromatic halidesInfo
- Publication number
- BR9809661A BR9809661A BR9809661-3A BR9809661A BR9809661A BR 9809661 A BR9809661 A BR 9809661A BR 9809661 A BR9809661 A BR 9809661A BR 9809661 A BR9809661 A BR 9809661A
- Authority
- BR
- Brazil
- Prior art keywords
- reduction
- oxygen
- halides
- liaih4
- aromatic
- Prior art date
Links
- -1 aromatic halides Chemical class 0.000 title abstract 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 4
- 239000001301 oxygen Substances 0.000 abstract 4
- 229910052760 oxygen Inorganic materials 0.000 abstract 4
- 239000012280 lithium aluminium hydride Substances 0.000 abstract 3
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 125000005842 heteroatom Chemical group 0.000 abstract 1
- 150000004678 hydrides Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B31/00—Reduction in general
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/26—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only halogen atoms as hetero-atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/08—Hydrogen atoms or radicals containing only hydrogen and carbon atoms
- C07D333/10—Thiophene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
Patente de Invenção: <B>"REDUçãO DE HALOGENETOS AROMáTICOS"<D>. Para reduzir haletos (hetero)aromáticos da fórmula geral Ar-Xn (I) para produzir composto da fórmula geral Ar-Hn (II), um agente de redução, em particular um reagente de hidreto tal como hidreto de alumínio e lítio (LiAIH4) é empregado na presença de oxigênio, em particular na forma de uma mistura de oxigênio e um gás neutro. A redução na presença de oxigênio produziu produções favoráveis dentro de tempos de reação curtos, mesmo na escala semi-industrial e industrial. A redução com LiAIH4 na presença de oxigênio é adequada para redução de haletos heteroaromáticos complexos, por exemplo, para a redução de bromonarwedinacetal em narwedinacetal na escala industrial.Invention Patent: <B> "REDUCING AROMATIC HALOGENETES" <D>. To reduce aromatic (hetero) halides of the general formula Ar-Xn (I) to produce a compound of the general formula Ar-Hn (II), a reducing agent, in particular a hydride reagent such as lithium aluminum hydride (LiAIH4) it is used in the presence of oxygen, in particular in the form of a mixture of oxygen and a neutral gas. The reduction in the presence of oxygen produced favorable yields within short reaction times, even on a semi-industrial and industrial scale. The reduction with LiAIH4 in the presence of oxygen is suitable for the reduction of complex heteroaromatic halides, for example, for the reduction of bromonarwedinacetal in narwedinacetal on an industrial scale.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0086597A AT405051B (en) | 1997-05-21 | 1997-05-21 | REDUCTION OF AROMATIC HALOGENIDE |
| PCT/AT1998/000112 WO1998052885A1 (en) | 1997-05-21 | 1998-04-30 | Reduction of aromatic halogenides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9809661A true BR9809661A (en) | 2000-07-11 |
Family
ID=3501602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9809661-3A BR9809661A (en) | 1997-05-21 | 1998-04-30 | Reduction of aromatic halides |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0983215A1 (en) |
| JP (1) | JP2001525828A (en) |
| KR (1) | KR20010012795A (en) |
| CN (1) | CN1257467A (en) |
| AT (1) | AT405051B (en) |
| AU (1) | AU7012798A (en) |
| BG (1) | BG103880A (en) |
| BR (1) | BR9809661A (en) |
| CA (1) | CA2289992A1 (en) |
| HU (1) | HUP0004681A2 (en) |
| NO (1) | NO995494D0 (en) |
| NZ (1) | NZ500733A (en) |
| PL (1) | PL336906A1 (en) |
| SK (1) | SK158399A3 (en) |
| WO (1) | WO1998052885A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006018703A2 (en) * | 2004-08-16 | 2006-02-23 | Ranbaxy Laboratories Limited | Processes for preparation of narwedine and its use in the synthesis of galantamine |
| WO2012073973A1 (en) * | 2010-12-02 | 2012-06-07 | 横浜ゴム株式会社 | Tire equipped with information acquisition device |
| CN107602318B (en) * | 2017-09-08 | 2020-06-05 | 郑州大学 | A method for liquid-phase reductive dehalogenation of halogenated aromatic hydrocarbons under mild conditions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3839329A1 (en) * | 1988-11-22 | 1990-05-31 | Basf Ag | METHOD FOR THE REDUCTIVE ENTHALOGENATION OF AROMATES |
-
1997
- 1997-05-21 AT AT0086597A patent/AT405051B/en not_active IP Right Cessation
-
1998
- 1998-04-30 KR KR1019997010758A patent/KR20010012795A/en not_active Withdrawn
- 1998-04-30 CN CN98805275.XA patent/CN1257467A/en active Pending
- 1998-04-30 JP JP54968898A patent/JP2001525828A/en active Pending
- 1998-04-30 PL PL98336906A patent/PL336906A1/en unknown
- 1998-04-30 AU AU70127/98A patent/AU7012798A/en not_active Abandoned
- 1998-04-30 HU HU0004681A patent/HUP0004681A2/en unknown
- 1998-04-30 WO PCT/AT1998/000112 patent/WO1998052885A1/en not_active Ceased
- 1998-04-30 BR BR9809661-3A patent/BR9809661A/en not_active Application Discontinuation
- 1998-04-30 SK SK1583-99A patent/SK158399A3/en unknown
- 1998-04-30 NZ NZ500733A patent/NZ500733A/en unknown
- 1998-04-30 EP EP98916623A patent/EP0983215A1/en not_active Withdrawn
- 1998-04-30 CA CA002289992A patent/CA2289992A1/en not_active Abandoned
-
1999
- 1999-11-10 NO NO995494A patent/NO995494D0/en not_active Application Discontinuation
- 1999-11-15 BG BG103880A patent/BG103880A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001525828A (en) | 2001-12-11 |
| PL336906A1 (en) | 2000-07-17 |
| NO995494L (en) | 1999-11-10 |
| HUP0004681A2 (en) | 2001-04-28 |
| WO1998052885A1 (en) | 1998-11-26 |
| AT405051B (en) | 1999-05-25 |
| BG103880A (en) | 2000-06-30 |
| CN1257467A (en) | 2000-06-21 |
| EP0983215A1 (en) | 2000-03-08 |
| KR20010012795A (en) | 2001-02-26 |
| NO995494D0 (en) | 1999-11-10 |
| NZ500733A (en) | 2001-03-30 |
| AU7012798A (en) | 1998-12-11 |
| SK158399A3 (en) | 2000-07-11 |
| CA2289992A1 (en) | 1998-11-26 |
| ATA86597A (en) | 1998-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BR9915651A (en) | Process for the preparation of alkanesulfonic acids. | |
| AUPO903897A0 (en) | Organic boronic acid derivatives | |
| BR0016665A (en) | Bleaching composition, and, bleaching and preparation methods of a bleaching composition | |
| BR0210253A (en) | Process for telomerization of non-cyclic olefins | |
| PT1114004E (en) | MIXTURES OF BETAO | |
| EA199900141A1 (en) | COLOR-FORMING COMPOSITION, CONTAINING REAGENT, INCLUDING PYROGALLIUM STRUCTURAL FRAGMENTS, SALT (IRON) AND ORGANIC ACID | |
| BR9810763A (en) | Absorbent composition for the purification of gases containing acidic components | |
| BR9911431A (en) | Process for the production of an aqueous solution of peroxycarboxylic monoester | |
| NO20011928L (en) | Stable high temperature catalysts for decomposition of N2O | |
| BRPI0417455A (en) | process for the preparation of formaldehyde | |
| ATE242183T1 (en) | GLASS COMPOSITION TO AVOID THE ALKALINE-SIILICA-SILICIC ACID REACTION | |
| MXPA02012944A (en) | Fatty acid analogues for the treatment of cancer. | |
| BR9808854A (en) | Process for preparing a compound, and, compound | |
| BR9807233A (en) | Process for preparing a diamine salt / dicarboxylic acid | |
| TR200003003T2 (en) | Titanium composition, containing catalyst formation | |
| BR9805329A (en) | Catalyst, process for preparing the catalyst and process for preparing vinyl acetate under application of the catalyst. | |
| BR9809661A (en) | Reduction of aromatic halides | |
| BR9713159A (en) | Substantially solid composition, compound, substantially solid salt composition, mixture, and, process for preparing a compound | |
| FI862420A0 (en) | PYRROLIDONDERIVAT. | |
| BR0009453A (en) | Process for the preparation of a compound | |
| BR0016209A (en) | Process for preparing a bar detergent composition | |
| AU2001283125A1 (en) | Compositions for defoaming aqueous compositions | |
| BR9810754A (en) | Catalyzing homogeneous oxidation using metal complexes | |
| BR0004787A (en) | Process for the preparation of pyrazolo [4,3-d] pyrimidin-7-ones-3-pyridylsulfonyl compounds and intermediates thereof | |
| BR9914783A (en) | Alkylation of benzene to form linear alkylbenzenes using fluoride-containingordenites |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B11A | Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing | ||
| B11Y | Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette] |