WO1998037059A1 - Preparation du 4-cyano-4'-hydroxybiphenyle - Google Patents
Preparation du 4-cyano-4'-hydroxybiphenyle Download PDFInfo
- Publication number
- WO1998037059A1 WO1998037059A1 PCT/FR1998/000289 FR9800289W WO9837059A1 WO 1998037059 A1 WO1998037059 A1 WO 1998037059A1 FR 9800289 W FR9800289 W FR 9800289W WO 9837059 A1 WO9837059 A1 WO 9837059A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cyano
- biphenyl
- protected
- formyl
- alkoxy
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/49—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C255/53—Carboxylic acid nitriles having cyano groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing cyano groups and hydroxy groups bound to the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
Definitions
- the invention relates to a process for the preparation of 4-cyano-4'-hydroxybiphenyl.
- This compound is known as an intermediate and used, for example, in the synthesis of monomers of liquid crystal polymers (GB 2002767) (J. Polym. Sci., Part C: Polymer Letters, Vol. 28, 345-355 (1990) ; J. Mater, Chem., 1993, 3 (6), 633-642) or for the formation of specific polysiloxanes (US 5262052).
- 4-cyano-4'-hydroxy-biphenyl can be prepared as described in application EP 44759 or in J. Mater. Chem., 1933, 3 (6), 633-642, by reaction of 4-bromo-4'-hydroxy-biphenyl with copper cyanide.
- Another preparation method described in US Pat. No. 5,262,052 consists in reacting di (4-methoxyphenyl) zinc with 4-bromobenzonitrile in the presence of Ni (PPh3) 4.
- the disadvantage of these methods is that they use toxic agents such as copper cyanide.
- the subject of the invention is a preparation process which does not use a toxic agent such as copper cyanide or which uses agents which are less toxic than those described in the prior art.
- the invention relates to a process for the preparation of 4-cyano-4'-hydroxybiphenyl, the process comprising:
- the reactions are preferably carried out under an inert atmosphere.
- the reactions can be carried out under a nitrogen atmosphere.
- the aldehyde function can be protected by conventional methods known to those skilled in the art.
- the protection can be implemented using, as an agent, ethylene glycol, propylene glycol or dimethyl ether.
- the reaction of the protected 4-bromobenzaldehyde with the Grignard reagent can be carried out in an aprotic solvent.
- the alkoxy group of the p-alkoxyphenyl magnesium halide is preferably an alkoxy having at most 5 carbon atoms; the alkoxy group can be, for example, a methoxy or ethoxy group and preferably the methoxy group and the halide used is preferably chloride or bromide.
- deprotection reaction depends on the reagent used for the protection reaction.
- Deprotection can be hydrolysis.
- the conversion of the formyl group to cyano can be carried out by the conventional methods known to those skilled in the art; hydroxylamine can be used as a reagent.
- the hydrolysis of the alkoxy group can be carried out without the hydrolysis of the cyano group using a suitable reagent such as pyridinium chloride.
- this solution is poured onto a mixture of 2- (4-bromophenyl) -1,3-dioxolane (5 g) in 50 ml of THF in the presence of a catalyst (Pd, 0.25%) while maintaining the temperature at O ° C.
- a catalyst Pd, 0.25%
- the reaction mixture is allowed to return to ambient temperature and the second fraction of the catalyst (0.25%) is added.
- the reaction mixture is then heated at 40 ° C for 2 hours.
- the collected aqueous phase is extracted with toluene (2 x 30 ml).
- the organic phases are combined and concentrated to obtain the desired product.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002280955A CA2280955A1 (fr) | 1997-02-18 | 1998-02-16 | Preparation du 4-cyano-4'-hydroxybiphenyle |
| NZ337648A NZ337648A (en) | 1997-02-18 | 1998-02-16 | Preparation of 4-cyano-4'-hydroxy biphenyl |
| US09/355,909 US6046352A (en) | 1997-02-18 | 1998-02-16 | Preparation of 4-cyano-4'-hydroxybiphenyl |
| JP53631398A JP2001511816A (ja) | 1997-02-18 | 1998-02-16 | 4−シアノ−4′−ヒドロキシビフェニルの製造 |
| EP98909541A EP0966432A1 (fr) | 1997-02-18 | 1998-02-16 | Preparation du 4-cyano-4'-hydroxybiphenyle |
| AU64044/98A AU6404498A (en) | 1997-02-18 | 1998-02-16 | Preparation of 4-cyano-4'-hydroxy biphenyl |
| NO993952A NO993952D0 (no) | 1997-02-18 | 1999-08-17 | Fremstilling av 4-cyano-4'-hydroksybifenyl |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR97/01861 | 1997-02-18 | ||
| FR9701861A FR2759696B1 (fr) | 1997-02-18 | 1997-02-18 | Preparation du 4-cyano-4'-hydroxy biphenyle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998037059A1 true WO1998037059A1 (fr) | 1998-08-27 |
Family
ID=9503837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1998/000289 Ceased WO1998037059A1 (fr) | 1997-02-18 | 1998-02-16 | Preparation du 4-cyano-4'-hydroxybiphenyle |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US6046352A (fr) |
| EP (1) | EP0966432A1 (fr) |
| JP (1) | JP2001511816A (fr) |
| KR (1) | KR20000071137A (fr) |
| CN (1) | CN1248242A (fr) |
| AU (1) | AU6404498A (fr) |
| CA (1) | CA2280955A1 (fr) |
| FR (1) | FR2759696B1 (fr) |
| NO (1) | NO993952D0 (fr) |
| NZ (1) | NZ337648A (fr) |
| WO (1) | WO1998037059A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516163B (zh) * | 2011-12-02 | 2013-09-25 | 江苏德威新材料股份有限公司 | 一种液晶功能化的吡啶化合物的制备和应用 |
| CN102676177A (zh) * | 2012-04-24 | 2012-09-19 | 杭州泽泉生物科技有限公司 | 一种联苯腈型液晶材料的生产工艺 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1596014A (en) * | 1977-08-24 | 1981-08-19 | Secr Defence | Optically active liquid crystal materials and liquid crystal devices containing them |
| EP0047453A1 (fr) * | 1980-09-04 | 1982-03-17 | Chisso Corporation | (Bêta-alkyloxyéthoxy)-4' cyano-4 biphényle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2400528A1 (fr) * | 1977-08-19 | 1979-03-16 | Thomson Csf | Substance organique polymerisable en phase mesomorphe, procede de fabrication et dispositif comportant une couche mince de ladite substance |
| FR2486955A1 (fr) * | 1980-07-18 | 1982-01-22 | Thomson Csf | Cristal liquide smectique de type a presentant une anisotropie dielectrique positive |
| US5262052A (en) * | 1992-03-09 | 1993-11-16 | Brigham Young University | Polysiloxanes containing pendant cyano substituted biphenyls as stationary phases for chromatographic columns |
-
1997
- 1997-02-18 FR FR9701861A patent/FR2759696B1/fr not_active Expired - Fee Related
-
1998
- 1998-02-16 WO PCT/FR1998/000289 patent/WO1998037059A1/fr not_active Ceased
- 1998-02-16 US US09/355,909 patent/US6046352A/en not_active Expired - Fee Related
- 1998-02-16 NZ NZ337648A patent/NZ337648A/xx unknown
- 1998-02-16 CA CA002280955A patent/CA2280955A1/fr not_active Abandoned
- 1998-02-16 CN CN98802662A patent/CN1248242A/zh active Pending
- 1998-02-16 JP JP53631398A patent/JP2001511816A/ja active Pending
- 1998-02-16 KR KR1019997007426A patent/KR20000071137A/ko not_active Withdrawn
- 1998-02-16 AU AU64044/98A patent/AU6404498A/en not_active Abandoned
- 1998-02-16 EP EP98909541A patent/EP0966432A1/fr not_active Withdrawn
-
1999
- 1999-08-17 NO NO993952A patent/NO993952D0/no not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1596014A (en) * | 1977-08-24 | 1981-08-19 | Secr Defence | Optically active liquid crystal materials and liquid crystal devices containing them |
| EP0047453A1 (fr) * | 1980-09-04 | 1982-03-17 | Chisso Corporation | (Bêta-alkyloxyéthoxy)-4' cyano-4 biphényle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001511816A (ja) | 2001-08-14 |
| NZ337648A (en) | 2000-01-28 |
| KR20000071137A (ko) | 2000-11-25 |
| NO993952L (no) | 1999-08-17 |
| FR2759696A1 (fr) | 1998-08-21 |
| CN1248242A (zh) | 2000-03-22 |
| AU6404498A (en) | 1998-09-09 |
| FR2759696B1 (fr) | 1999-04-16 |
| CA2280955A1 (fr) | 1998-08-27 |
| US6046352A (en) | 2000-04-04 |
| NO993952D0 (no) | 1999-08-17 |
| EP0966432A1 (fr) | 1999-12-29 |
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