C5H5NO3
127.1 g/mol
Pharmaceutical IntermediateDanger
5-Methylisoxazole-4-carboxylic acid
CAS42831-50-5EC700-400-1
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
5-Methylisoxazole-4-carboxylic acid is a chemical compound used as a pharmaceutical intermediate. It serves as a building block in the synthesis of various active pharmaceutical ingredients, particularly those incorporating the isoxazole ring system.
Pharmaceutical intermediate for the synthesis of drug candidatesBuilding block in medicinal chemistry research
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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CAS 42831-50-5
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Referencesame scaffold
5-Methyl-4-isoxazolecarboxylic acid chloride
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research compound
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4-Bromo-5-methylisoxazole
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1-(4-Isoxazolyl)ethanone
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3-Isoxazolecarboxylic acid
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Safety Reference
Danger
H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
Identifiers
IUPAC Name
5-methyl-1,2-oxazole-4-carboxylic acid
InChIKey
VQBXUKGMJCPBMF-UHFFFAOYSA-N
SMILES
CC1=C(C=NO1)C(=O)O
Synonyms (16)
- 5-Methylisoxazole-4-carboxylic Acid; Leflunomide Imp. D (EP); Leflunomide Impurity D
- LEFLUNOMIDE IMPURITY D (EP IMPURITY)
- LEFLUNOMIDE IMPURITY, 5-METHYLISOXAZOLE-CARBOXYLIC ACID-(USP IMPURITY)
- Leflunomide EP Impurity D
- Leflunomide impurity, 5-methylisoxazole-carboxylic acid-(USP)
- Leflunomide Impurity D