WO2005028431A1 - Process for the purification of 1,4-benzoquinone guanylhydrazone thiosemicarbazone (ambazone) - Google Patents
Process for the purification of 1,4-benzoquinone guanylhydrazone thiosemicarbazone (ambazone) Download PDFInfo
- Publication number
- WO2005028431A1 WO2005028431A1 PCT/RO2004/000016 RO2004000016W WO2005028431A1 WO 2005028431 A1 WO2005028431 A1 WO 2005028431A1 RO 2004000016 W RO2004000016 W RO 2004000016W WO 2005028431 A1 WO2005028431 A1 WO 2005028431A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ambazone
- benzoquinone
- purification
- guanylhydrazone
- thiosemicarbazone
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C335/00—Thioureas, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C335/04—Derivatives of thiourea
- C07C335/06—Derivatives of thiourea having nitrogen atoms of thiourea groups bound to acyclic carbon atoms
- C07C335/08—Derivatives of thiourea having nitrogen atoms of thiourea groups bound to acyclic carbon atoms of a saturated carbon skeleton
Definitions
- the present invention relates to the process for the purification of 1,4-benzoquinone guanylhydrazone (ambazone), with formula I, in order to obtain a substance with pharmaceutical quality.
- Ambazone is used as active pharmaceutical principle to obtain the medicinal product FA INGOSEPT ® .
- Impurities present in ambazone were isolated and characterized by current physical- chemical methods (RMN spectra, mass spectra, IR spectra, ITV-VIS spectra). The following impurities are presented in ambazone product: a) 1,4-benzoquinone guanylhydrazone (II); b) 1 ,4-benzoquinone bis-guanylhydrazone (III) ; c) 1,4-benzoquinone guanylsemicarbazone (III); d) elementary sulfur.
- the proposed technical solution is a purification method of crude ambazone resulted from chemical synthesis, in two steps.
- crude ambazone is macerated with a non-polar solvent (benzene, n-hexane, toluene or xylene) to remove the sulfur.
- a non-polar solvent benzene, n-hexane, toluene or xylene
- ambazone is recrystallized from the mixture N,N-dimethylfo ⁇ namide and lower aliphatic alcohols (Ct - C 4 ) at temperatures between 50 - 80°C, to remove the impurities (II),(ffl) and (IV).
- a ratio ambazone : solvent 1 : 1 - 5 (m/v) and temperatures between 20 - 60°C. It is preferably to use a ratio of 1 : 3 and a temperature of 40°C.
- the resulted ambazone is dissolved in 40 ml N,N-dimethylformamide, is again heated at 60°C and it is added 80 ml methanol. The temperature of solution must not be below 55°C during the addition of methanol. Ambazone solution in the mixture N,N-dimethylformamide : methanol is cooled and is maintained two hours at 5 - 10°C. 17 g pure ambazone are isolated with HPLC assay of mimmum 99.5 %.
- Example 2 22 g crude ambazone are macerated under stirring with 66 ml toluene for one hour at 45°C. Isolated ambazone by filtration (20.1 g) is dissolved at 60 - 65°C in 40 ml N,N-dimefhylformamide and then 80 ml ethanol are slowly added. After cooling and perfection for two hours at 5 - 10°C it results 16.8 g ambazone with HPLC assay of minimum 99.5 %.
- Example 3 30 g crude ambazone are macerated with 90 ml toluene for one hour at 40°C. 55 ml N,N-dimethylfomiamide and 110 ml methanol are added to ambazone isolated by filtration (27.75 g) and then heated, under stirring, at 60 - 65°C. After a perfection of approximately 15 minutes at this temperature, it is cooled and is perfected two hours at 5 - 10°C. It results 25 g ambazone with HPLC assay of minimum 99.5 %.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UAA200604639A UA78470C2 (en) | 2003-09-22 | 2004-09-15 | Process for the purification of 1,4-benzoquinone guanylhydrazone thiosemicarbazone (ambazone) |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ROA2003-00779 | 2003-09-22 | ||
ROA200300779A RO122360B1 (en) | 2003-09-22 | 2003-09-22 | Process for the purification of 1,4-benzoquinone-guanylhydrazone-thiosemicarbazone (ambazone) |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005028431A1 true WO2005028431A1 (en) | 2005-03-31 |
Family
ID=34374497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RO2004/000016 WO2005028431A1 (en) | 2003-09-22 | 2004-09-15 | Process for the purification of 1,4-benzoquinone guanylhydrazone thiosemicarbazone (ambazone) |
Country Status (4)
Country | Link |
---|---|
RO (1) | RO122360B1 (en) |
RU (1) | RU2333905C2 (en) |
UA (1) | UA78470C2 (en) |
WO (1) | WO2005028431A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106211598A (en) * | 2016-08-31 | 2016-12-07 | 广东成德电子科技股份有限公司 | A kind of organic film removing agent of printed circuit board and preparation method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB774794A (en) * | 1953-01-30 | 1957-05-15 | Bayer Ag | Quinone condensation products |
-
2003
- 2003-09-22 RO ROA200300779A patent/RO122360B1/en unknown
-
2004
- 2004-09-15 UA UAA200604639A patent/UA78470C2/en unknown
- 2004-09-15 RU RU2006113589/04A patent/RU2333905C2/en active
- 2004-09-15 WO PCT/RO2004/000016 patent/WO2005028431A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB774794A (en) * | 1953-01-30 | 1957-05-15 | Bayer Ag | Quinone condensation products |
Non-Patent Citations (2)
Title |
---|
S. PETERSEN, ET AL.: "Synthese einfacher Chinon-Derivate mit fungiziden, bakteriostatischen oder cytostatischen Eigenschaften", ANGEWANDTE CHEMIE, vol. 8, no. 67, 1955, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, pages 217 - 231, XP002078051, ISSN: 0044-8249 * |
W. SCHULZE, ET AL.: "Beziehungen zwischen Strucktur und cancerostatischer Wirksamkeit an der experimentellen Mäuseleukämie L 1210 bei Hydrazonderivaten des p-Benzochinones", DIE PHARMAZIE, vol. 33, no. 2-3, February 1978 (1978-02-01), VEB VERLAG VOLK UND GESUNDHEIT, BERLIN, DD, pages 111 - 113, XP002316105 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106211598A (en) * | 2016-08-31 | 2016-12-07 | 广东成德电子科技股份有限公司 | A kind of organic film removing agent of printed circuit board and preparation method thereof |
CN106211598B (en) * | 2016-08-31 | 2019-01-18 | 广东成德电子科技股份有限公司 | A kind of organic film removing agent of printed circuit board and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
RU2333905C2 (en) | 2008-09-20 |
RU2006113589A (en) | 2006-08-27 |
UA78470C2 (en) | 2007-03-15 |
RO122360B1 (en) | 2009-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3421503B1 (en) | Sugammadex preparation and purification method | |
EP1873158B1 (en) | Crystals of morphinan derivative and process for producing the same | |
WO2007134846A2 (en) | Process for purification of anastrozole | |
EP1896429A2 (en) | A purification process for anastrozole intermediate | |
EP1781624A2 (en) | A process for preparing 1-methoxymethyl-5,5-diphenylbarbituric acid | |
JP4933253B2 (en) | Method for producing iohexol | |
JP2008536836A (en) | Preparation method of anticancer agent | |
WO2005028431A1 (en) | Process for the purification of 1,4-benzoquinone guanylhydrazone thiosemicarbazone (ambazone) | |
BG65699B1 (en) | Process for the synthesis of a tetrazol derivative | |
DK1682497T3 (en) | PROCEDURE FOR PURIFYING MESOTRION | |
EP1824811B1 (en) | Process for the purification of benzphetamine hydrochloride | |
CA2178369C (en) | Process for the purification and crystallisation of iopamidol | |
EP3666756B1 (en) | Method for preparing levetiracetam | |
Song et al. | A simple method for preparation of N-mono-and N, N-di-alkylated α-amino acids | |
ES2439322T3 (en) | Amino alcohol derivatives and their therapeutic activities | |
KR20090014225A (en) | Polymorphs of (r)-5-(2-aminoethyl)-1-(6,8-difluorochroman-3-yl)-1,3-dihydroimidazole-thione hydrochloride | |
US6316657B1 (en) | Process for purification or recovery of sweetener | |
RU2227141C2 (en) | Method for preparing benzylamine | |
JP2022093057A (en) | Method for producing amlodipine besilate | |
US4676933A (en) | Method for purification of amido acids | |
JP2022024937A (en) | Biotin and production method thereof, and production method of salts of biotin and amines | |
WO2023144678A1 (en) | Process for the purification of 5-aminosalicylic acid | |
JPH03190847A (en) | Purification of 3,4-dichloronitrobenzene | |
JPH07100669B2 (en) | Method for separating benzene tri-substituted isomers and agent for inclusion separation used in the method | |
WO2011000396A1 (en) | Purification of letrozole intermediate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GM HR HU ID IL IN IS JP KE KG KP KZ LC LK LR LS LT LU LV MA MD MK MN MW MX MZ NA NI NO NZ PG PH PL PT RO RU SC SD SE SG SK SY TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SZ TZ UG ZM ZW AM AZ BY KG MD RU TJ TM AT BE BG CH CY DE DK EE ES FI FR GB GR HU IE IT MC NL PL PT RO SE SI SK TR BF CF CG CI CM GA GN GQ GW ML MR SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006113589 Country of ref document: RU |
|
122 | Ep: pct application non-entry in european phase |