SU146313A1 - Method for preparing 3- (4'-aminobenzenesulfonamido) -6-alkoxypyridazines from 3-amino-6-alkoxypyridazines and 4-acetylaminobenzenesulfonyl chloride - Google Patents
Method for preparing 3- (4'-aminobenzenesulfonamido) -6-alkoxypyridazines from 3-amino-6-alkoxypyridazines and 4-acetylaminobenzenesulfonyl chlorideInfo
- Publication number
- SU146313A1 SU146313A1 SU641812A SU641812A SU146313A1 SU 146313 A1 SU146313 A1 SU 146313A1 SU 641812 A SU641812 A SU 641812A SU 641812 A SU641812 A SU 641812A SU 146313 A1 SU146313 A1 SU 146313A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- alkoxypyridazines
- amino
- aminobenzenesulfonamido
- preparing
- acetylaminobenzenesulfonyl chloride
- Prior art date
Links
Description
|||11«.даад,щ| Известные способы получени 3-(4-а.минобензолсульфонамидо)-6алкоксипиридазинов предусматривают сплавлен е 3,б-ди.хлорпиридазина с 4-ацетиламинобензолхлоридом и поташем и обработку образовавшегос продукта реакции метилатом натри под давлением с получением 3-(4-амииобспзолсульфоиам1:до)-6-мстокспиридаз11иа. Кроме 1 этого, возможно коиденсировать З-амино-б-метоксипиридазин с 4-ацетилам 1 юбензолсульфон-хлоридом в пр1гсутствии шфидина с образованием 3-(4-аминобензолсульфонамидо)-6-метоксипиридазина. Этими способами, в особенности при конденсации в присутствии пиридина не получают чистого продукта, так что требуютс многочисленные его перекристаллизации. Предлагаемый способ позвол ет устранить указанный недостаток и заключаетс в следующем. 3-(4-аминобензолсульфона.мидо)-6-алкоксипиридазинполучают путем взаимоде; гстЕ; 1 мол З-амино-6-алкоксипиридазина с 2 мол ми 4-ацетиламинобензолсульфонхлорида в присутствии смеси триметили триэтиламина св зывающей НС1. Сначала образуютс (4-ацетиламинобензолсульфонил)-амино -6-алкоксипиридазины , которые легко изолируютс и могут рмыл тьс в соответствуюнше 3-(4-аминобензолсульфонамидо)-6-алкоксипиридазины ...||| 11 ". Dada, u | Known methods for the preparation of 3- (4-a.minobenzolsulfonamido) include fused -6alkoksipiridazinov e 3b-4-di.hlorpiridazina atsetilaminobenzolhloridom and potash, and processing the resulting pressurized reaction product with sodium methoxide to give 3- (4-amiiobspzolsulfoiam1: w) -6-mstokspiridaz11ia. In addition to 1 of this, it is possible to co-oxidize 3-amino-b-methoxypyridazine with 4-acetyl 1 jubensol sulfonyl chloride in the presence of chfidine to form 3- (4-aminobenzenesulfonamido) -6-methoxypyridazine. By these methods, especially by condensation in the presence of pyridine, no pure product is obtained, so that its numerous recrystallizations are required. The proposed method eliminates this drawback and is as follows. 3- (4-aminobenzenesulfone.amido) -6-alkoxypyridazin is obtained by the interaction; gctE; 1 mole of 3-amino-6-alkoxypyridazine with 2 moles of 4-acetylaminobenzenesulfonyl chloride in the presence of a mixture of trimethyl triethylamine binding HC1. First, (4-acetylaminobenzenesulfonyl) -amino-6-alkoxypyridazines are formed, which are easily isolated and can be washed in the corresponding 3- (4-aminobenzenesulfonamido) -6-alkoxypyridazines ...
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU641812A SU146313A1 (en) | 1959-10-22 | 1959-10-22 | Method for preparing 3- (4'-aminobenzenesulfonamido) -6-alkoxypyridazines from 3-amino-6-alkoxypyridazines and 4-acetylaminobenzenesulfonyl chloride |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU641812A SU146313A1 (en) | 1959-10-22 | 1959-10-22 | Method for preparing 3- (4'-aminobenzenesulfonamido) -6-alkoxypyridazines from 3-amino-6-alkoxypyridazines and 4-acetylaminobenzenesulfonyl chloride |
Publications (1)
Publication Number | Publication Date |
---|---|
SU146313A1 true SU146313A1 (en) | 1961-11-30 |
Family
ID=48301787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU641812A SU146313A1 (en) | 1959-10-22 | 1959-10-22 | Method for preparing 3- (4'-aminobenzenesulfonamido) -6-alkoxypyridazines from 3-amino-6-alkoxypyridazines and 4-acetylaminobenzenesulfonyl chloride |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU146313A1 (en) |
-
1959
- 1959-10-22 SU SU641812A patent/SU146313A1/en active
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