29598-22-9

Basic information

• Product Name: 2H-1-Benzopyran-2-one, 3,4-dihydro-4,4-dimethyl-
• CAS NO: 29598-22-9
• Molecular Formula: C11H12O2
• Molecular Weight: 176.215
• Mol File: 29598-22-9.mol

Chemical Properties

• CAS DataBase Reference: 2H-1-Benzopyran-2-one, 3,4-dihydro-4,4-dimethyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 2H-1-Benzopyran-2-one, 3,4-dihydro-4,4-dimethyl-(29598-22-9)
• EPA Substance Registry System: 2H-1-Benzopyran-2-one, 3,4-dihydro-4,4-dimethyl-(29598-22-9)

Safety Data

• Hazardous Substances Data: 29598-22-9(Hazardous Substances Data)

Upstream product

• 51380-79-1 β-phenylisovaleryl p-nitrobenzoyl peroxide 
• 62726-47-0 β-phenylisovaleryl peroxide 
• 541-47-9 3-Methylbutenoic acid 
• 108-95-2 phenol 

Downstream Products

• 106380-31-8 2-(1,1,3-trimethyl-3hydroxybutyl)-phenol 
• 40614-20-8 3-(2'-Hydroxyphenyl)-3,3-dimethylpropanol 
• 479070-63-8 3-Methyl-3-(2-methoxyphenyl)butansaeure-methylester 
• 24423-04-9 3-(2-Hydroxy-phenyl)-3-methyl-butyric acid 
• 1019769-52-8 2-(1,1-dimethyl-3-morpholin-4-yl-3-oxopropyl)phenol 
• 129967-39-1 3-(2'-(Benzyloxy)phenyl)-3,3-dimethylpropionic Acid 
• 40614-27-5 4,4-dimethylchromane 
• 88579-29-7 p-[(E)-2-(3,4-dihydro-4,4-dimethyl-2H-1-benzopyran-6-yl)propenyl]benzoic acid 
• 88579-28-6 ethyl p-[(E)-2-(4,4-dimethyl-6-chromanyl)propenyl]-benzoate 
• 92617-92-0 3-(2-hydroxyphenyl)-3-methylbutyne 
• 92617-93-1 4-(2-hydroxyphenyl)-4-methylpent-2-yne 
• 92617-94-2 1-deutero-3-(2-hydroxyphenyl)-3-methylbutyne 
• 33214-38-9 3-Methyl-3-(2-methoxyphenyl)butansaeure 
• 1047665-33-7 C₁₁H₁₅NO₂ 

Relevant articles and documents

Selective Oxygen Atom Insertion into an Aryl-Palladium Bond

The chemistry of a palladium(II) complex containing both an alkyl- and an aryl-palladium bond is reported. The reaction of [Pd(CH2CMe2C6H4)(MesN=CHCH=NMes)] with bromine or iodine leads to reductive elimination of 1,1-dimethylcyclobutabenzene with formation of [PdX2(MesN=CHCH=NMes)] (X = Br, I). However, the reaction with hydrogen peroxide gives [Pd(CH2CMe2C6H4O)(MesN=CHCH=NMes)] by overall oxygen atom insertion into the aryl-palladium rather than the alkyl-palladium bond. This complex [Pd(CH2CMe2C6H4O)(MesN=CHCH=NMes)] reacts with bromine, iodine, or hydrogen peroxide to give 3,3-dimethyl-2,3-dihydrobenzofuran and the corresponding complex [PdX2(MesN=CHCH=NMes)]. The mechanisms of reaction and basis for selectivity are discussed. The results support the view that oxygen atom insertion is a mechanistically viable pathway for selective catalytic oxidation of hydrocarbons by the green oxidant hydrogen peroxide.

ON THE REACTION OF SUBSTITUTED PHENOLS AND 3-METHYLBUT-2-ENOIC ACID. A COMPARATIVE STUDY

A systematic and comparative study of the reaction of a series of substituted phenols and 3-methylbut-2-enoic acid in zinc chloride/phosphorus oxychloride and aluminum chloride/phosphorus oxychloride reveals that the formation of phenolic esters and 2,2-dimethyl-4-chromanones is strongly influenced by the substituents, their popsition on the aromatic ring of the starting phenols.Based on our study, a mixed Friedel-Crafts and Fries rearrangement mechanism is in operation in these reactions.

On the synthesis of substituted 2,2-dimethyl1-4-chromanones and related compounds

A systematic study of the reaction of a series of monosubstituted phenols 3 and 3-methylbut-2-enoic acid 4 in phosphorus oxychloride/zinc chloride revealed that the formation of 4-chromanones was strongly infuenced by the substituents and their position on the aromatic ring of the starting phenols.

The Surface of Silica as a Medium for the Radical and Ionic Decomposition of Diacyl Peroxides

The rates of decomposition of β-phenylpropionyl peroxide 1, β-phenylisovaleryl peroxide 2, and β-phenylisovaleryl p-nitrobenzoyl peroxide 3 are much higher on silica surfaces than they are in solution.The products formed on silica surfaces are derived from both radical and ionic precursors except in the case of 3, for which the reaction may be entirely ionic.The relationships between the medium effects on the rates and on the products suggest that the ionic and radical parts of the reaction branch from a common polar intermediate.Both the ionic and radical products differ significantly from those formed in solution.In the neophyl radical, adsorption inhibits the migration of phenyl to form phenyl-tert-butyl radical.In the ionic reaction, there is extensive migration of methyl in competition with phenyl, in contrast to the behavior of neophyl derivatives in solvolysis reaction.Dihydrocoumarin, from 1, and dimethyldihydrocoumarin, from 2 and 3, are not formed at all in solution.Esters, which are often formed via carboxy inversion and related reactions when polar diacyl peroxides decompose in solution, appear to arise from electron transfer in radial-pair precursors.There is no evidence of carboxy inversion compounds or carbonic acid esters in the physically adsorbed products, although some RO-C(=O)+ groups (1-2percent) appear to be trapped by the silica.Rearranged and unrearranged neophyl cations are trapped more extensively as silyl ethers.Other ion-derived products are one of the phenylisobutylenes, several phenylbutenes, and the carboxylic acids.Coadsorbed oxygen or acetonitrile alters the product distribution partly by trapping radicals and partly by site preemption effects.