ECSP982467A - PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDES - Google Patents
PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDESInfo
- Publication number
- ECSP982467A ECSP982467A ECSP982467A ECSP982467A EC SP982467 A ECSP982467 A EC SP982467A EC SP982467 A ECSP982467 A EC SP982467A EC SP982467 A ECSP982467 A EC SP982467A
- Authority
- EC
- Ecuador
- Prior art keywords
- formula
- hydroxy
- amino
- carboxamide oxime
- salt
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Esta invención se refiere a un proceso novedoso para preparar HALUROS DE ACIDO O-(3-AMINO-2-HIDROXI-PROPIL)-HIDROXIMICO de fórmula (I) por medio de la reacción de una oxima de carboxamida de fórmula (II), en la cual R1 tiene los valores indicados con un derivado de 3-amino-2-hidroxi-propano reactivo; diazotizar la oxima de carboxamida sustituida en O resultante con nitrito de sodio en presencia de haluro de hidrógeno; descomponer la sal de diazonio, aislar el producto obtenido y, si fuera conveniente, separar los enantiómeros ópticamente activos y/o hacer reaccionar la base resultante con un ácido mineral u orgánico. El proceso comprende hacer reaccionar oxima de carboxamida de fórmula (II) con una sal de 3-hidroxi acetidinio de fórmula (III), en la que R2 y R3 tiene los valores indicados precedentemente, e Y es una sal que forma un anión en un medio alcohólico inferior, preferentemente etanólico, alcalizado mediante un hidróxido alcalino, y antes de diazotizar el producto intermedio de oxima de carboxamida sustituída en O obtenido, la mezcla de la reacción es neutralizada y se elimina el solvente orgánico. El proceso de la invención da compuestos de fórmula (I) con un rendimiento mayor, comparado con los procesos del arte previo.This invention relates to a novel process for preparing O- (3-AMINO-2-HYDROXY-PROPIL) -HYDROXIMIC ACID HALIDS of formula (I) by reaction of a carboxamide oxime of formula (II), in which R1 has the values indicated with a reactive 3-amino-2-hydroxy-propane derivative; diazotize the resulting O-substituted carboxamide oxime with sodium nitrite in the presence of hydrogen halide; decompose the diazonium salt, isolate the product obtained and, if appropriate, separate the optically active enantiomers and / or react the resulting base with a mineral or organic acid. The process comprises reacting carboxamide oxime of formula (II) with a 3-hydroxy acetidinium salt of formula (III), in which R2 and R3 have the values indicated above, and Y is a salt that forms an anion in a Lower alcoholic medium, preferably ethanolic, alkalized by an alkaline hydroxide, and before diazotizing the obtained O-substituted carboxamide oxime intermediate, the reaction mixture is neutralized and the organic solvent is removed. The process of the invention gives compounds of formula (I) with a higher yield, compared to the processes of the prior art.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ECSP982467 ECSP982467A (en) | 1998-04-02 | 1998-04-02 | PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ECSP982467 ECSP982467A (en) | 1998-04-02 | 1998-04-02 | PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDES |
Publications (1)
Publication Number | Publication Date |
---|---|
ECSP982467A true ECSP982467A (en) | 1999-01-19 |
Family
ID=42043388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ECSP982467 ECSP982467A (en) | 1998-04-02 | 1998-04-02 | PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDES |
Country Status (1)
Country | Link |
---|---|
EC (1) | ECSP982467A (en) |
-
1998
- 1998-04-02 EC ECSP982467 patent/ECSP982467A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
PT1222173E (en) | METHOD FOR PREPARING A 4-TRIFLUOROMETHYL-SULFINYLPYRAZOLE DERIVATIVE | |
DE502005006163D1 (en) | METHOD FOR PRODUCING QUADARY AMMONIUM COMPOUNDS OF HIGH PURITY | |
CO4940491A1 (en) | PROCESS TO PREPARE O- (3-AMINO-2-HYDROXY- PROPIL) -HYDROXIMIC ACID HALIDES | |
JP2002532455A5 (en) | ||
AR036000A1 (en) | PROCESS FOR THE PREPARATION OF INDOL DERIVATIVES AND NOVEDOUS INTERMEDIARIES | |
ECSP982467A (en) | PROCESS TO PREPARE O- (3-AMINO -2- HYDROXY-PROPIL) HYDROXYMIC ACID HALIDES | |
PT1317455E (en) | METHOD FOR PREPARING A REPLACED IMIDAZOPYRIDINE COMPOUND | |
PT1023272E (en) | PROCESS FOR THE PRODUCTION OF ALCOXITRIAZOLINONAS | |
BR9400817A (en) | Process for preparing sulfonylurea derivatives, process for preparing sulfonylchloride derivatives, 1 - (((pyrazolesulfonyl) amino) carbonyl) pyridinium hydroxide and process for preparing compounds | |
EA200100723A1 (en) | METHOD OF OBTAINING 1- (AMINOMETHYL) CYCLOHEXYLIC ACID | |
AU7049501A (en) | Method for the production of omega-aminoalkylsulphonic acids | |
KR101777923B1 (en) | SYNTHESIZING METHOD OF α-TERTIARY ARYL KETONE | |
KR910016754A (en) | 7- (diphenylmethyl) oxy-9a-methoxymitosan, preparation method and use thereof | |
KR960010613A (en) | Azo Coupling of 2,4-Disubstituted Phenols with 2-nitroaniline | |
WO2004056734A8 (en) | Process for producing anthracene diether | |
BRPI0406676A (en) | Process for preparing substituted imidazole derivatives to prepare a compound and resulting compound | |
ATE275129T1 (en) | METHOD FOR PRODUCING AROMATIC ACYLTHIOCARBOXIC ACID DERIVATIVES | |
IL153962A0 (en) | Production method of an ether compound | |
DE59803008D1 (en) | Process for the production of ethynylcyclopropane | |
AU2001256253A1 (en) | Chemical process | |
ES2285971T1 (en) | IMIDAZO PREPARATION PROCESS (1,2-A) PIRIDIN-3-ACETAMIDA (2005/24). | |
GB211772A (en) | Manufacture of acylacetyl-compounds | |
BR0009691A (en) | Process for the preparation of phenoxy glyoxylic acid ester oximes | |
ATE286497T1 (en) | PRODUCTION OF HYDROXY COMPOUNDS | |
JPH0578544B2 (en) |