62108-28-5

Basic information

• Product Name: 4,8-Dimethyl-1,7-nonadiene
• Synonyms: 4,8-Dimethyl-1,7-nonadiene
• CAS NO: 62108-28-5
• Molecular Formula: C₁₁H₂₀
• Molecular Weight: 152.28
• Mol File: 62108-28-5.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 179.9±10.0 °C(Predicted)
• Appearance: /
• Density: 0.765±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 4,8-Dimethyl-1,7-nonadiene(CAS DataBase Reference)
• NIST Chemistry Reference: 4,8-Dimethyl-1,7-nonadiene(62108-28-5)
• EPA Substance Registry System: 4,8-Dimethyl-1,7-nonadiene(62108-28-5)

Safety Data

• Hazardous Substances Data: 62108-28-5(Hazardous Substances Data)

Upstream product

• 106-23-0 3,7-dimethyl-oct-6-enal 
• 75-11-6 diiodomethane 
• 1779-49-3 Methyltriphenylphosphonium bromide 
• 61078-14-6 1-methyl-2-(methylsulfonyl)-1H-benzo[d]imidazole 
• 15358-94-8 2-(2,6-dimethylhept-5-enyl)oxirane 
• 79099-07-3 N-tert-butyloxycarbonylpiperidin-4-one 

Downstream Products

• 94768-64-6 ((E)-4,8-Dimethyl-nona-1,7-dienylselanyl)-benzene 
• 94768-65-7 3-((E)-6-Benzeneselenonyl-3-methyl-hex-5-enyl)-2,2-dimethyl-oxirane 
• 55816-08-5 (E)-(4,8-dimethylnona-1,7-dien-1-yl)benzene 

Relevant articles and documents

Methylenation for Aldehydes and Ketones Using 1-Methylbenzimidazol-2-yl Methyl Sulfone

The methylenation reagent 1-methylbenzimidazol-2-yl methyl sulfone 2 reacts with various aldehydes and ketones in the presence of t-BuOK (room temperature, 1 h) in dimethylformamide to give the corresponding terminal alkenes generally in high yields. For sensitive substrates, the reaction is better carried out at low temperature using sodium hexamethyldisilazide in 1,2-dimethoxyethane. The byproduct is easily removed from the products, and the reaction conditions are mild and practical. Reagent 2 can be easily prepared from commercially available 2-mercaptobenzimidazole 5 in 95% yield without any expensive reagents.

Practical Methylenation Reaction for Aldehydes and Ketones Using New Julia-Type Reagents

A new Julia-type methylenation reagent, 1-methyl-2-(methylsulfonyl)benzimidazole (1e), reacts with a variety of aldehydes and ketones in the presence of either NaHMDS (-55 °C to rt) or t-BuOK (rt, 1 h) in DMF to give the corresponding terminal alkenes in high yields. The byproducts are easily removed, and the reaction conditions are mild and practical.

Wittig-type Reaction of Dimetallated Carbodianion Species as Produced by Zinc Reduction of gem-Polyhalogen Compounds in the Presence of Levis Acids

Treatment of R1COR2 with a suspension prepared from diiodomethane, trimethylaluminium and excess zinc in tetrahydrofuran at room temperature affords olefins R1R2C=CH2 in fair (R1,R2=alkyl) to good (R1=alkyl, R2=H) yields.The ketone methylenation is better carried with another system consisting of CH2Br2-Zn-TiCl4.Ketones and aldehydes are transformed into α-chloro α,β-unsaturated esters or α,β-unsaturated esters in good yields on treatment with methyl trichloroacetate or t-butyl dichloroacetate (ethyl dibromoacetate) in the presence of diethylaluminium chloride and zinc.