31981-99-4

Basic information

• Product Name: (1Z,3S)-1-diazonio-3-{[(4-methylphenyl)sulfonyl]amino}but-1-en-2-olate
• CAS NO: 31981-99-4
• Molecular Formula: C₁₁H₁₃N₃O₃S
• Molecular Weight: 267.3042
• Mol File: 31981-99-4.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: (1Z,3S)-1-diazonio-3-{[(4-methylphenyl)sulfonyl]amino}but-1-en-2-olate(CAS DataBase Reference)
• NIST Chemistry Reference: (1Z,3S)-1-diazonio-3-{[(4-methylphenyl)sulfonyl]amino}but-1-en-2-olate(31981-99-4)
• EPA Substance Registry System: (1Z,3S)-1-diazonio-3-{[(4-methylphenyl)sulfonyl]amino}but-1-en-2-olate(31981-99-4)

Safety Data

• Hazardous Substances Data: 31981-99-4(Hazardous Substances Data)

Usage

General Description

The chemical (1Z,3S)-1-diazonio-3-{[(4-methylphenyl)sulfonyl]amino}but-1-en-2-olate, also known as Methyl Orange, is an organic compound and an azo dye commonly used as a pH indicator in analytical chemistry. Its chemical structure includes a diazonium group, a sulfonyl amino group, and a butenolate group, making it capable of undergoing azo coupling reactions to form brightly colored azo dyes. Methyl Orange is commonly used in titrations to determine the endpoint of a reaction, as its color changes from red to yellow at a pH of around 3.1-4.4. Due to its use as a dye and indicator, Methyl Orange is classified as a hazardous chemical and should be handled and disposed of according to safety regulations.

Upstream product

• 98-59-9 p-toluenesulfonyl chloride 
• 4816-81-3 p-tosyl-L-alanine 
• 79-37-8 oxalyl dichloride 
• 186581-53-3 diazomethane 
• 56271-34-2 (S)-2-(4-methylbenzenesulfonylamino)propionyl chloride 

Downstream Products

• 173034-72-5 methyl (3S)-3-(4-methylbenzene-1-sulfonamido)butanoate 
• 331000-11-4 (2S,3S)-2-Methyl-3-phenyl-1-(toluene-4-sulfonyl)-azetidin-3-ol 
• 209850-56-6 N-((S)-4-Diazo-1-methyl-3-oxo-butyl)-4-methyl-benzenesulfonamide 
• 209850-49-7 (S)-3-(Toluene-4-sulfonylamino)-butyric acid 
• 31982-00-0 N-tosyl-L-phenylalanine chloromethylketone 

Relevant articles and documents

1,5-rhodium shift in rearrangement of N -arenesulfonylazetidin-3-ols into benzosultams

Benzosultams are synthesized in an enantiopure form starting from α-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by β-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.

Reductive aldol and mannich-type reactions of azetidin-3-ones promoted by titanium tetraiodide

A convenient method is described for the generation and reaction of the enolates of aminoacetone equivalents, which uses the reduction of azetidin-3-one with titanium tetraiodide and subsequent reactions with electrophiles. This methodology provides a str

Antitumor agents: diazomethyl ketone and chloromethyl ketone analogues prepared from N-tosyl amino acids

Diazomethyl ketone and chloromethyl ketone analogues prepared from N-tosyl amino acids have been synthesized and tested for antitumor activity in Ehrlich ascites carcinoma and P-388 lymphocytic leukemia screens in mice. The N-tosyl chloromethyl ketone ana