2566-04-3

Basic information

• Product Name: 1,1-Dibromo-2-ethynyl-2-methylcyclopropane
• Synonyms: 1,1-Dibromo-2-ethynyl-2-methylcyclopropane
• CAS NO: 2566-04-3
• Molecular Formula: C6H6Br2
• Molecular Weight: 0
• Mol File: 2566-04-3.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1,1-Dibromo-2-ethynyl-2-methylcyclopropane(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1-Dibromo-2-ethynyl-2-methylcyclopropane(2566-04-3)
• EPA Substance Registry System: 1,1-Dibromo-2-ethynyl-2-methylcyclopropane(2566-04-3)

Safety Data

• Hazardous Substances Data: 2566-04-3(Hazardous Substances Data)

Upstream product

• 69438-58-0 2,2-dibromo-1-methylcyclopropanecarbaldehyde 
• 75-25-2 Bromoform 
• 78-80-8 2-methylbut-1-en-3-yne 

Downstream Products

• 2568-76-5 1-bromo-2-methyl-2-ethynylcyclopropane 
• 2568-76-5 (+/-)-1r-Aethinyl-2t-brom-1-methyl-cyclopropan 
• 2568-76-5 (+/-)-1r-Aethinyl-2c-brom-1-methyl-cyclopropan 
• 2568-73-2 (+/-)-1-Acetyl-2,2-dibrom-1-methyl-cyclopropan 
• 3136-49-0 (+/-)-5-(9-Anthryl)-1-(2,2-dibrom-1-methyl-cyclopropyl)-penta-1,3-diin 

Relevant articles and documents

Chemistry of Dihalocyclopropanes XXV. The Influence of Halogen Substituents on the Vinylcyclopropylidene-Cyclopentenylidene Rearrangement

Starting from 2,2-dibromocyclopropanecarbaldehyde and its 1-methyl analogue, some chloro- and bromo-vinyl-substituted derivatives have been prepared, and their reactions with methyllithium studied at 0 and -78 deg C with emphasis on the formation of cyclopentadienes and allenes.Most reactions produced allenes, monobromides and bicyclopropylidenes.A rearrangement product, viz. 1-chloro-4-methylcyclopentadiene, was only encountered from the reaction of (E)-1,1-dibromo-2-(2-chloroethenyl)cyclopropane.The electronic effect of a chlorine substituent does not influence significantly the allene to cyclopentadiene ratio, which seems to be governed mainly by steric interactions.Reactions of 1,1-dibromo-2-(2,2-dibromoethenyl)cyclopropane and its 2-methyl analogue furnished the corresponding ethynyl derivatives as sole products; lithium-bromine exchange occurred preferentially at the vinylic carbon.