16681-71-3

Basic information

• Product Name: 1-METHYL-1H-1,2,3-TRIAZOLE-4-CARBOXYLIC ACID
• Synonyms: 1-METHYL-1H-1,2,3-TRIAZOLE-4-CARBOXYLIC ACID;1-Methyl-1H-1,2,3-triazole-4-carboxylic acid AldrichCPR
• CAS NO: 16681-71-3
• Molecular Formula: C₄H₅N₃O₂
• Molecular Weight: 127.1014
• Mol File: 16681-71-3.mol
• Article Data: 3

Chemical Properties

• Melting Point: 224 °C (decomp)
• Boiling Point: 350.695 °C at 760 mmHg
• Flash Point: 165.894 °C
• Appearance: /
• Density: 1.549 g/cm³
• PKA: 3.36±0.50(Predicted)
• CAS DataBase Reference: 1-METHYL-1H-1,2,3-TRIAZOLE-4-CARBOXYLIC ACID(CAS DataBase Reference)
• NIST Chemistry Reference: 1-METHYL-1H-1,2,3-TRIAZOLE-4-CARBOXYLIC ACID(16681-71-3)
• EPA Substance Registry System: 1-METHYL-1H-1,2,3-TRIAZOLE-4-CARBOXYLIC ACID(16681-71-3)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 16681-71-3(Hazardous Substances Data)

Usage

Uses

1-Methyl-1H-1,2,3-triazole-4-carboxylic acid is used as a reactant in the preparation of click chelators for platinum-based anticancer drugs.

Upstream product

• 16681-69-9 1-methyl-1H-1,2,3-triazole-4-carbaldehyde 
• 624-90-8 methyl azide 
• 471-25-0 Propiolic acid 
• 116057-94-4 1-Methyl-4-trinitromethyl-1,2,3-triazole 
• 39039-48-0 1-methyl-1H-1,2,3-triazole-4-carboxylate d'ethyle 
• 13273-53-5 4-bromo-1-methyl-1H-1,2,3-triazole 
• 74-88-4 methyl iodide 

Downstream Products

• 216065-41-7 4-(N-Bocamino)-1-methyl-1,2,3-triazole 
• 16681-65-5 1-methyl-1,2,3-triazole 

Relevant articles and documents

Preparation method of 1-subtituted-1H-1,2,3-triazole-4-carboxylic acid

The invention provides a preparation method of 1-subtituted-1H-1,2,3-triazole-4-carboxylic acid. The preparation method includes the following steps: 1-substituted-4,5-dibromo-1H-1,2,3-triazole is added to an isopropylmagnesium chloride, such that 1-substituted-4-bromo-1H-1,2,3-triazole is obtained through a reaction; an isopropylmagnesium chloride-lithium chloride complex is added directly, such that a mixture of 1-substituted-1H-1,2,3-triazole-4-carboxylic acid and 1-substituted-4-bromo-1H-1,2,3-triazole-5-carboxylic acid is obtained; a base and iodomethane are added to the mixture, such that methyl 1-substituted-4-bromo-1H-1,2,3-triazole-5-carboxylare is obtained through a reaction; the aqueous layer is adjusted with hydrochloric acid until a pH value is 1-5; extraction is carried out with an organic solvent, and drying and concentration crystallization are carried out, such that 1-substituted-1H-1,2,3-triazole-4-carboxylic acid is obtained. The method is suitable for industrial production, and has a great application value.

Degradation of trinitro(1,2,3-triazol-4-yl)methanes to 1,2,3-triazolecarboxylic acids

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