209912-22-1

Basic information

• Product Name: 1-[2-(4-methylphenyl)ethynyl]-1H-1,2,3-benzotriazole
• Synonyms: 1-[2-(4-methylphenyl)ethynyl]-1H-1,2,3-benzotriazole
• CAS NO: 209912-22-1
• Molecular Weight: 233.272
• Mol File: 209912-22-1.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: 1-[2-(4-methylphenyl)ethynyl]-1H-1,2,3-benzotriazole(CAS DataBase Reference)
• NIST Chemistry Reference: 1-[2-(4-methylphenyl)ethynyl]-1H-1,2,3-benzotriazole(209912-22-1)
• EPA Substance Registry System: 1-[2-(4-methylphenyl)ethynyl]-1H-1,2,3-benzotriazole(209912-22-1)

Safety Data

• Hazardous Substances Data: 209912-22-1(Hazardous Substances Data)

Upstream product

• 122296-00-8 1-<(trimethylsilyl)methyl>benzotriazole 
• 874-60-2 4-methyl-benzoyl chloride 
• 189343-47-3 2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-methylphenyl)-1-ethanone 
• 361379-17-1 (Z)-2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-methylphenyl)ethenyl trifluoromethanesulfonate 
• 314765-29-2 (E)-2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-methylphenyl)ethenyl trifluoromethanesulfonate 
• 95-14-7 1,2,3-Benzotriazole 
• 125172-89-6 [(4-methylphenyl)ethynyl](phenyl)iodonium tosylate 
• 51126-65-9 potassium salt of benzotriazole 

Downstream Products

• 14062-19-2 p-tolylacetic acid ethyl ester 
• 3287-02-3 4-(phenylethynyl)toluene 

Relevant articles and documents

A novel access to disubstituted acetylenes

Reactions of organometallic reagents with 1-(substituted ethynyl)-1H-1,2,3-benzotriazoles 5 derived from a variety of benzotriazolylmethyl ketones 3 afforded disubstituted acetylenes in synthetically useful yields.

A convenient synthesis of new 1-alkynyl-1H-benzotriazoles by reaction of alkynyl(phenyl)iodonium salts with benzotriazole ion

The reaction of arylethynyl(phenyl)iodonium tosylates with benzotriazole ion gave new 1-alkynyl-1H-benzotriazoles in good yields. This result indicates that alkynyliodonium salts can be used for direct alkynylation of benzotriazole. However, the similar reactions of (tert- butylethynyl)(phenyl)iodonium and 1-octynyl(phenyl)iodonium tosylates do not afford the 1-alkynyl-1H-benzotriazoles but alkenylbenzotriazoles via the reaction of alkylidenecarbenes.

Alkynylbenzotriazoles by direct alkynylation of benzotriazole using alkynyliodonium salts

Alkynyl(phenyl)iodonium salts react with benzotriazole ion prepared from benzotriazole and potassium t-butoxide to give 1-alkynylbenzotriazoles in good yields, indicating that the alkynyliodonium salts can be used for direct alkynylation of benzotriazole.