ES267592A1 - Procedure for the obtaining of new benzo-1,3-oxazinadionas- (2-4) (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the obtaining of new benzo-1,3-oxazinadionas- (2-4) (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES267592A1 ES267592A1 ES0267592A ES267592A ES267592A1 ES 267592 A1 ES267592 A1 ES 267592A1 ES 0267592 A ES0267592 A ES 0267592A ES 267592 A ES267592 A ES 267592A ES 267592 A1 ES267592 A1 ES 267592A1
- Authority
- ES
- Spain
- Prior art keywords
- formula
- medium
- meaning
- inert solvent
- see
- 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.)
- Expired
Links
Landscapes
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
Procedure for obtaining new benzo-1,3-oxazindiones- (2,4) of the formula ** (See formula) ** where R1 and R2, which may be the same or different, represent chlorine or bromine, R3 represents hydrogen, chlorine or bromine, R4 represents hydrogen, chlorine, bromine or the nitric group, characterized by the fact a) transforming an aromatic o-hydrocarboxylic acid of the formula ** (See formula) ** where they have the meaning indicated above, with at least 2 moles of a chlorocarbonic acid ester of the formula ClCOOR5 where R 5 represents a lower alkyl, aralkyl or aryl moiety, in the presence of at least 2 moles of an antacid medium, advantageously in an inert solvent, or an aromatic o-hydrocarboxylic acid, substituted in the oxy group, of the formula ** (See formula) ** where R1 and R5 have the meaning indicated above, either with at least one mole of a chlorocarbonic acid ester of the above-mentioned general formula, in the presence of at least one mole of an antacid medium, advantageously in an inert solvent, or with a halogenation medium at elevated temperatures, conveniently using an excess of said halogenation medium, and optionally in the presence of a solvent, obtaining a mixed anhydride of the formula ** (See formula) ** wherein R1 and R5 have the above-indicated meaning and X represents a halogen atom or the residue -O-COOR5, and the same is transformed with an amine of the formula ** (See formula) ** where R2 to R4 have the above meaning, advantageously in the presence of an inert solvent, and, if X represents a halogen atom in the anhydride formula, in the presence of an antacid medium, or b) transform an o-hydroxybenzanilide of the formula where R1 to R4 have the meanings indicated above with phosgene, an ester of chlorocarbonic acid of the formula indicated above or a carbonic acid ester of the formula ** (See formula) ** wherein R 5 has the meaning indicated above, in the presence of an antacid medium, conveniently in an inert solvent, or transform an aromatic o-hydroxycarboxylic acid of the formula ** (See formula) ** well with a phenyl isocyanate of the formula ** (See formula) ** where R2 to R4 have the meanings indicated above, conveniently at elevated temperatures and advantageously in an inert solvent, or with a phenylcarbamic acid chloride of the formula ** (See formula) ** where R2 to R4 have the above meaning, in the presence of a medium combining a halogen hydroxide and conveniently in an inert solvent, obtaining an aromatic o-O-phenylcarbamoyl carboxylic acid of the formula ** (See formula) ** where R1 to R4 have the above-mentioned meaning, and cyclize it either by heating, preferably at temperatures comprised between 100 and 200º C, and conveniently in a high boiling solvent, or by heating with a water separating medium, preferably a temperatures between 80 and 100º C, and possibly in the presence, of a solvent. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0267592A ES267592A1 (en) | 1961-05-22 | 1961-05-22 | Procedure for the obtaining of new benzo-1,3-oxazinadionas- (2-4) (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0267592A ES267592A1 (en) | 1961-05-22 | 1961-05-22 | Procedure for the obtaining of new benzo-1,3-oxazinadionas- (2-4) (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES267592A1 true ES267592A1 (en) | 1961-12-16 |
Family
ID=34494691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0267592A Expired ES267592A1 (en) | 1961-05-22 | 1961-05-22 | Procedure for the obtaining of new benzo-1,3-oxazinadionas- (2-4) (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES267592A1 (en) |
-
1961
- 1961-05-22 ES ES0267592A patent/ES267592A1/en not_active Expired
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