EP1107943A1 - Verfahren zur herstellung von 2-amino-5-cyanophenol - Google Patents
Verfahren zur herstellung von 2-amino-5-cyanophenolInfo
- Publication number
- EP1107943A1 EP1107943A1 EP99943937A EP99943937A EP1107943A1 EP 1107943 A1 EP1107943 A1 EP 1107943A1 EP 99943937 A EP99943937 A EP 99943937A EP 99943937 A EP99943937 A EP 99943937A EP 1107943 A1 EP1107943 A1 EP 1107943A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- compound
- iii
- aprotic solvent
- cyanide
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/06—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton from hydroxy amines by reactions involving the etherification or esterification of hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/14—Preparation of carboxylic acid nitriles by reaction of cyanides with halogen-containing compounds with replacement of halogen atoms by cyano groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
Definitions
- PROCESS FOR MAKING 2-AMINO-5-CYANOPHENOL Scope of the Invention This invention relates to a process for making intermediates useful for making certain phenyl urea compounds.
- the end-product phenyl urea compounds are useful in treating IL-8, GRO ⁇ , GRO ⁇ , GRO ⁇ and NAP-2 mediated diseases. They are disclosed in PCT application serial number PCT/US96/13632, published 21 August 1997 as WIPO No. WO97/29743 and co-pending U.S. application 08/894291.
- Interleukin-8 is a chemoattractant for neutrophils, basophils, and a subset of
- T-cells The T-cells. It is produced by a majority of nucleated cells including macrophages, fibroblasts, endothelial and epithelial cells exposed to TNF, IL-la, IL-lb or LPS, and by neutrophils themselves when exposed to LPS or chemotactic factors such as FMLP.
- This invention provides a method for making 2-amino-5-cyano-phenol which is a useful intermediate for synthesising N-[2-hydroxy-4-cyanophenyl]-N'-[2-bromophenyl]urea, a compound disclosed in the aforementioned PCT application.
- This invention relates to a process for making 2-amino-5-cyanophenol.
- this process comprises preparing the phenol of Formula (I)
- this invention comprises a process for preparing a compound of Formula (I) from o-anisidine, which process comprises treating o-anisidine with a halogenating agent to obtain Formula (III)
- Scheme 1 outlines the chemistry for preparing to 2-amino-5-cyanophenol, a third stage intermediate in a synthesis of N-[2-hydroxy-4-cyanophenyl]-N'-[2- bromophenyljurea.
- stage A The p ⁇ r ⁇ bromination of o-anisidine (stage A) has been described in the literature, using several different reagents (Choudary, B. M.; Sudha, Y., and Reddy, P. N. Synlett., 1994, 450; Reeves, W. P.; and King, R. M. Synth. Comm. 1993, 23, 855; Fox, G. J.; Hallas, G.; Hepworth, J. D.; and Paskins, K. N. Org. Synth., Coll. Vol. 6, 181).
- the crude reaction product is typically a mixture of the starting material, Formula (III), the ortho isomer 2-bromo-6-methoxy-aniline (1) and the product of over bromination, 2,4-dibromo-6-methoxy-aniline (2) below.
- a typical crude GC product ratio for 2,4,4,6-tetrabromo-2,5-cyclohexadien-l-one was 15% o- anisidine/6% formula 1/61% o-anisidine/17% formula 2; for HBr-DMSO it was 13% o-anisidine/13% formula 1/53% Formula (II)/22% formula 2.
- stage b was effected by treating Formula (III) with copper (I) cyanide in either refluxing NN-dimethylformamide or l-methyl-2-pyrrolidinone for 3-5 hours. While the reaction proceeded faster in l-methyl-2-pyrrolidinone, workup was difficult and it was easiest to carry the crude reaction mixture through stage c, then purify by crystallization Stage c provided a crude recovery of 75%.
- stage c Demethylation of crude Formula (II) (stage c) was effected by several reagents: boron tribromide, sodium ethyl thiolate, and sodium cyanide in refluxing dimethyl sulfoxide.
- boron tribromide the reaction is carried out in an aprotic solvent such as methylene chloride.
- the reaction is carried out under an inert gas such as nitrogen. This reaction goes to completion at a reduced temperature, i.e., about -10 to +10 °C in about 1-3 hours.
- the sodium cyanide reaction proceeds best in dimethyl sulfoxide.
- the reaction is run under an inert gas such as nitrogen. Refluxing for 3-7 hours is needed to effect the reaction.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9833598P | 1998-08-28 | 1998-08-28 | |
US98335P | 1998-08-28 | ||
PCT/US1999/019494 WO2000012461A1 (en) | 1998-08-28 | 1999-08-26 | Process for making 2-amino-5-cyanophenol |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1107943A1 true EP1107943A1 (de) | 2001-06-20 |
EP1107943A4 EP1107943A4 (de) | 2002-07-24 |
Family
ID=22268831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99943937A Withdrawn EP1107943A4 (de) | 1998-08-28 | 1999-08-26 | Verfahren zur herstellung von 2-amino-5-cyanophenol |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1107943A4 (de) |
JP (1) | JP2003525856A (de) |
CA (1) | CA2341711A1 (de) |
WO (1) | WO2000012461A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY143477A (en) | 2002-10-29 | 2011-05-31 | Smithkline Beecham Corp | Il-8 receptor antagonists |
RU2008145871A (ru) | 2006-04-21 | 2010-05-27 | Смитклайн Бичам Корпорейшн (US) | Антагонисты рецептора il-8 |
PL2009992T3 (pl) | 2006-04-21 | 2012-11-30 | Glaxosmithkline Llc | Antagoniści receptora IL-8 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1792156A (en) * | 1928-01-17 | 1931-02-10 | Gen Aniline Works Inc | 5-halogen-2-amino-1-alkyloxy and 1-aralkyloxy-benzenes and intermediate products thereof and process of preparing them |
EP0100172A1 (de) * | 1982-07-23 | 1984-02-08 | Imperial Chemical Industries Plc | Amide-Derivate |
US5508464A (en) * | 1986-11-07 | 1996-04-16 | L'oreal | Process for the preparation of 5,6-dihydroxyindole and intermediate compounds |
WO1998033763A1 (en) * | 1997-01-30 | 1998-08-06 | American Home Products Corporation | Substituted hydroxy-anilino derivatives of cyclobutene-3,4-diones |
-
1999
- 1999-08-26 CA CA002341711A patent/CA2341711A1/en not_active Abandoned
- 1999-08-26 JP JP2000567496A patent/JP2003525856A/ja not_active Withdrawn
- 1999-08-26 EP EP99943937A patent/EP1107943A4/de not_active Withdrawn
- 1999-08-26 WO PCT/US1999/019494 patent/WO2000012461A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1792156A (en) * | 1928-01-17 | 1931-02-10 | Gen Aniline Works Inc | 5-halogen-2-amino-1-alkyloxy and 1-aralkyloxy-benzenes and intermediate products thereof and process of preparing them |
EP0100172A1 (de) * | 1982-07-23 | 1984-02-08 | Imperial Chemical Industries Plc | Amide-Derivate |
US5508464A (en) * | 1986-11-07 | 1996-04-16 | L'oreal | Process for the preparation of 5,6-dihydroxyindole and intermediate compounds |
WO1998033763A1 (en) * | 1997-01-30 | 1998-08-06 | American Home Products Corporation | Substituted hydroxy-anilino derivatives of cyclobutene-3,4-diones |
Non-Patent Citations (1)
Title |
---|
See also references of WO0012461A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1107943A4 (de) | 2002-07-24 |
JP2003525856A (ja) | 2003-09-02 |
WO2000012461A1 (en) | 2000-03-09 |
CA2341711A1 (en) | 2000-03-09 |
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Legal Events
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A4 | Supplementary search report drawn up and despatched |
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18D | Application deemed to be withdrawn |
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