769-57-3

Basic information

• Product Name: (3-methylbut-2-en-2-yl)benzene
• Synonyms: (3-Methylbut-2-en-2-yl)benzene; .alpha.,.beta.,.beta.-Trimethylstyrene; benzene, (1,2-dimethyl-1-propen-1-yl)-; Benzene, (1,2-dimethyl-1-propenyl)-
• CAS NO: 769-57-3
• Molecular Formula: C₁₁H₁₄
• Molecular Weight: 146.2289
• Mol File: 769-57-3.mol
• Article Data: 42

Chemical Properties

• Boiling Point: 191.7°C at 760 mmHg
• Flash Point: 61.7°C
• Density: 0.877g/cm³
• Vapor Pressure: 0.706mmHg at 25°C
• Refractive Index: 1.51
• CAS DataBase Reference: (3-methylbut-2-en-2-yl)benzene(CAS DataBase Reference)
• NIST Chemistry Reference: (3-methylbut-2-en-2-yl)benzene(769-57-3)
• EPA Substance Registry System: (3-methylbut-2-en-2-yl)benzene(769-57-3)

Safety Data

• Hazardous Substances Data: 769-57-3(Hazardous Substances Data)

Usage

General Description

(3-methylbut-2-en-2-yl)benzene, also known as isopropenylbenzene, is a chemical compound with the molecular formula C10H10. It is a colorless liquid with a sweet, floral-like odor and is commonly used as a fragrance and flavor ingredient in the manufacturing of perfumes, soaps, and other cosmetic products. It is also used as a precursor in the production of polystyrene plastics and synthetic rubber. (3-methylbut-2-en-2-yl)benzene is a volatile organic compound and can be harmful if inhaled, ingested, or absorbed through the skin in high concentrations. It is important to handle and store this chemical with care to prevent potential health risks.

Upstream product

• 3280-08-8 2-methyl-3-phenyl-butan-2-ol 
• 64-19-7 acetic acid 
• 611-70-1 phenyl isopropyl ketone 
• 17498-71-4 3-methyl-2-phenyl-1-butene 
• 24470-78-8 isopropyltriphenylphosphonium iodide 
• 98-86-2 acetophenone 
• 938-16-9 2,2-dimethylpropiophenone 
• 15325-61-8 3-methyl-1-phenyl-1-butene 
• 173033-88-0 2-Phenyl-2-(propane-2-sulfonyl)-propionic acid ethyl ester 
• 136175-22-9 2-tert-butyl-2-phenyl-1-(4-tolylsulfonyl)aziridine 
• 24379-49-5 (trimethylsilyl)phenyldiazomethane 
• 67-64-1 acetone 
• 1530-33-2 isopropyltriphenylphosphonium bromide 
• 117139-77-2 4,4,5-trimethyl-2,5-diphenyl-1,3-oxathiolane 

Downstream Products

• 51284-29-8 2-Cyclohexyl-3-methylbutan 
• 29290-99-1 2-methyl-3-phenylbut-1-en-3-ol 
• 25982-72-3 2-methyl-3-phenyl-but-3-en-2-ol 
• 62837-59-6 1,2-dimethyl-1-phenyl-1-propanol 
• 3280-08-8 2-methyl-3-phenyl-butan-2-ol 
• 22876-56-8 1,2-dimethyl-1-phenyl-propylamine 
• 21578-99-4 rac-α,β,β-trimethylstyrene oxide 
• 76-89-1 methyl benzilate 
• 107-31-3 Methyl formate 
• 1074-12-0 phenylglyoxal hydrate 
• 98-86-2 acetophenone 
• 67-64-1 acetone 
• 65-85-0 benzoic acid 
• 99943-05-2 1-acetoxy-2-methyl-3-phenylbut-2-ene 

Relevant articles and documents

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Spiro[1,2]oxaphosphetanes of nonstabilized and semistabilized phosphorus ylide derivatives: Synthesis and kinetic and computational study of their thermolysis

A series of tri- and tetrasubstituted spiro-oxaphosphetanes stabilized by ortho-benzamide (oBA) and N-methyl ortho-benzamide (MoBA) ligands have been synthesized by the reaction of Cα,Cortho-dilithiated phosphazenes with aldehydes and ketones. They include enantiopure products and the first example of an isolated oxaphosphetane having a phenyl substituent at C3 of the ring. Kinetic studies of their thermal decomposition showed that the process takes place irreversibly through a polar transition state (ρ = -0.22) under the influence of electronic, [1,2], [1,3] steric, and solvent effects, with C3/P-[1,2] interactions as the largest contribution to ΔG of olefination. Inversion of the phosphorus configuration through stereomutation has been observed in a number of cases. DFT calculations showed that oBA derivatives olefinated through the isolated (N, O)(Ph, C6H4, C) oxaphosphetanes (Channel A), whereas MoBA compounds decomposed faster via the isomer (C6H4, O)(C, N, Ph) formed by P-stereomutation involving a MB2 permutational mechanism (Channel B). The energy barrier of P-isomerization is lower than that of olefination. Fragmentation takes place in a concerted asynchronous reaction. The thermal stability of oxaphosphetanes is determined by strong C3/P-[1,2] interactions destabilizing the transition state of olefination. The effect of charge distribution and C3/C4-[1,2] and C4/P-[1,3] steric and solvent interactions on ΔG was also evaluated.

Extending the Substrate Scope in the Hydrogenation of Unfunctionalized Tetrasubstituted Olefins with Ir-P Stereogenic Aminophosphine-Oxazoline Catalysts

Air-stable and readily available Ir-catalyst precursors modified with MaxPHOX-type ligands have been successfully applied in the challenging asymmetric hydrogenation of tetrasubstituted olefins under mild reaction conditions. Gratifyingly, these catalyst precursors are able to efficiently hydrogenate not only a range of indene derivatives (ee's up to 96%) but also 1,2-dihydronapthalene derivatives and acyclic olefins (ee's up to 99%), which both constitute the most challenging substrates for this transformation.