209912-24-3

Basic information

• Product Name: 1-[2-(4-chlorophenyl)ethynyl]-1H-benzotriazole
• Synonyms: 1-[2-(4-chlorophenyl)ethynyl]-1H-benzotriazole
• CAS NO: 209912-24-3
• Molecular Weight: 253.691
• Mol File: 209912-24-3.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: 1-[2-(4-chlorophenyl)ethynyl]-1H-benzotriazole(CAS DataBase Reference)
• NIST Chemistry Reference: 1-[2-(4-chlorophenyl)ethynyl]-1H-benzotriazole(209912-24-3)
• EPA Substance Registry System: 1-[2-(4-chlorophenyl)ethynyl]-1H-benzotriazole(209912-24-3)

Safety Data

• Hazardous Substances Data: 209912-24-3(Hazardous Substances Data)

Upstream product

• 122296-00-8 1-<(trimethylsilyl)methyl>benzotriazole 
• 122-01-0 4-chloro-benzoyl chloride 
• 361379-15-9 (Z)-2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-chlorophenyl)ethenyl trifluoromethanesulfonate 
• 314765-27-0 (E)-2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-chlorophenyl)ethenyl trifluoromethanesulfonate 
• 95-14-7 1,2,3-Benzotriazole 
• 123466-28-4 [(4-chlorophenyl)ethynyl](phenyl)iodonium tosylate 
• 51126-65-9 potassium salt of benzotriazole 

Downstream Products

• 14062-24-9 4-chloro-benzeneacetic acid, ethyl ester 

Relevant articles and documents

One-carbon homologation of carboxylic acids via BtCH2TMS: A safe alternative to the Arndt-Eistert reaction

Carboxylic acids are converted into the corresponding homologated acids or esters, using easily available 1-(trimethylsilylmethyl)benzotriazole (1) as a one-carbon synthon. The effectiveness of the reaction has been investigated on six aryl and seven alkyl carboxylic acids.

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.