42066-39-7

Basic information

• Product Name: 2,2,6,6-tetramethylhepta-3,4-diene
• CAS NO: 42066-39-7
• Molecular Formula: C₁₁H₂₀
• Molecular Weight: 152.2765
• Mol File: 42066-39-7.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 177.4°C at 760 mmHg
• Flash Point: 52.4°C
• Density: 0.752g/cm³
• Vapor Pressure: 1.41mmHg at 25°C
• Refractive Index: 1.436
• CAS DataBase Reference: 2,2,6,6-tetramethylhepta-3,4-diene(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2,6,6-tetramethylhepta-3,4-diene(42066-39-7)
• EPA Substance Registry System: 2,2,6,6-tetramethylhepta-3,4-diene(42066-39-7)

Safety Data

• Hazardous Substances Data: 42066-39-7(Hazardous Substances Data)

Upstream product

• 6165-76-0 propargyl p-toluenesulfonate 
• 677-22-5 tert-butylmagnesium chloride 
• 51088-78-9 (2R)-2r,3t-di-tert-butyl-cyclopropanone (toluene-4-sulfonyl)-hydrazone 
• 2259-30-5 tert-butylmagnesium bromide 
• 109279-76-7 (R)(S)-1-bromo-4,4-dimethyl-1,2-pentadiene 
• 121887-80-7 Methanesulfonic acid (R)-1-tert-butyl-prop-2-ynyl ester 
• 22688-39-7 (1R)-2-oxo-bornane-10-sulfonic acid (R)-1-tert-butyl-4,4-dimethyl-pent-2-ynyl ester 

Downstream Products

• 56391-02-7 3-tert-Butyl-4-[2,2-dimethyl-prop-(E)-ylidene]-2,2-dimethyl-cyclobutanone 
• 56175-16-7 3-tert-Butyl-4-[2,2-dimethyl-prop-(Z)-ylidene]-2,2-dimethyl-cyclobutanone 
• 75805-75-3 [(Z)-1-(1-Chloro-2,2-dimethyl-propyl)-3,3-dimethyl-but-1-enylselanyl]-benzene 

Relevant articles and documents

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Reaction of 1-bromo-1,2-dienes with alkylcuprates as a regio- and stereo-selective route to acetylenic or allenic compounds

Alkylcuprates react with 1-bromo-1,2-dienes to give allenic and/or acetylenic products.The selectivity of the crosscoupling is markedly dependent on the nature of the copper reagent, which plays a prominent role in determining both the regio- and the stereo-chemistry.The preparative aspects of these copper-induced reactions are discussed and their possible mechanism discussed.

REACTIONS OF 3-ALKYL- AND 3,3-DIALKYL-1-BROMOALLENES WITH ORGANOCUPRATES: EFFECTS OF THE NATURE OF THE CUPRATE REAGENT ON THE REGIO- AND STEREOSELECTIVITY

Organocuprates induce 1,3- and direct substitution in 3-alkyl- and 3,3-dialkyl-1-bromo-1,2-dienes leading respectively to either terminal acetylenes or allenic hydrocarbons.The nature of the cuprate exerts a prominent role in determining both the regio- and the stereochemistry of these reactions.