459-51-8

Basic information

• Product Name: Benzene, 1-fluoro-4-(fluoromethyl)-
• CAS NO: 459-51-8
• Molecular Formula: C7H6F2
• Molecular Weight: 128.121
• Mol File: 459-51-8.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: Benzene, 1-fluoro-4-(fluoromethyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1-fluoro-4-(fluoromethyl)-(459-51-8)
• EPA Substance Registry System: Benzene, 1-fluoro-4-(fluoromethyl)-(459-51-8)

Safety Data

• Hazardous Substances Data: 459-51-8(Hazardous Substances Data)

Upstream product

• 459-46-1 4-Fluorobenzyl bromide 
• 1960404-19-6 1,3-dioxoisoindolin-2-yl 2-(4-fluorophenyl)acetate 
• 352-11-4 1-chloromethyl-4-fluorobenzene 
• 352-32-9 p-fluorotoluene 
• 459-57-4 4-fluorobenzaldehyde 
• 462-06-6 fluorobenzene 
• 420-03-1 fluoromethyl alcohol 
• 5435-44-9 (E)-3-Ureido-but-2-enoic acid ethyl ester 

Downstream Products

• 99138-88-2 N-(4-fluorobenzyl)-4-methyl-2-nitroaniline 
• 2248-13-7 1-(but-3-en-1-yl)-4-fluorobenzene 

Relevant articles and documents

METHOD AND REAGENT FOR DEOXYFLUORINATION

A safe, simple, and selective method and reagent for deoxyfluorination is disclosed. With the method and reagent disclosed herein, organic compounds such as carboxylic acids, carboxylates, carboxylic acid anhydrides, aldehydes, and alcohols can be fluorinated by using the most common nucleophilic fluorinating reagents and electron deficient fluoroarenes as mediators under mild conditions, giving corresponding fluoroorganic compounds in excellent yield with a wide range of functional group compatibility and easy product purification. For example, directly utilizing KF for deoxyfluorination of carboxylic acids provides the most economical and the safest pathway to access acyl fluorides, key intermediates for syntheses of peptide, amide, ester, and dry fluoride salts.

Quaternary Ammonium Trifluoromethoxide Salts as Stable Sources of Nucleophilic OCF3

The reaction of nucleophilic tertiary amines with trifluoromethyl and pentafluoroethyl methyl ethers provides quaternary ammonium trifluoromethoxide (NR4OCF3) and pentafluoroethoxide (NR4OCF2CF3) salts, respectively, in good yields. The new trifluoromethoxide salts disclosed herein are uniquely stable for extended periods of time in both the solid state and in solution, which complements contemporary reagents. Here we describe the preparation of a range of NR4OCF3 salts, their long-term stability, and utility in substitution reactions.

Solvent free nucleophilic introduction of fluorine with [bmim][F]

1-n-Butyl-3-methylimidazolium fluoride ([bmim][F]) proved very efficient fluorinated reagent for nucleophilic substitution over sulfonate esters and alkyl halides. Preparation of the ionic liquid as well as its use as the reagent has been performed to be the more eco-friendly as possible. No organic solvent is needed for the fluoride introduction, reaction times are reduced by using microwave as the heating source, and the ionic liquids carefully recycled. Furthermore, no special care has to be taken as the presence of water in [bmim][F] was not deleterious to the transformation yield.