71195-14-7

Upstream product

• 625-33-2 3-penten-2-one 
• 625-27-4 2-methyl-2-pentene 
• 2564-18-3 1-phenyl-3-((dimethylamino)styryl)-5-((dimethylamino)phenyl)-2-pyrazoline 

Downstream Products

• 926-56-7 4-methyl-1,3-pentadiene 
• 1118-58-7 1,3-Dimethyl-1,3-butadien 
• 3043-33-2 2-methyl-2,3-pentadiene 
• 84154-76-7 3-(1-bromo-ethyl)-2,2-dimethyl-oxirane 
• 558-13-4 carbon tetrabromide 
• 2610-95-9 6,6-dimethyltetrahydro-2H-pyran-2-one 
• 2610-96-0 α,γ,γ-trimethylbutyrolactone 
• 208582-21-2 (1E)-3-methyl-1-phenylpent-1-en-3-ol 

Relevant academic research and scientific papers

NATURAL BITHIOPHENES AS SINGLET OXYGEN SENSITIZERS

The possibility of using naturally-occurring bithiophenes 4-8 as singlet oxygen photosensitizers has been explored using the reaction of adamantylideneadamantane, 9, and 2-methyl-2-pentene, 11, with singlet oxygen as test reactions.All compounds 4-8 have been found to catalyse the conversions 9 --> 10 and 11 --> 12 + 13.All the reactions are quenched by 1,4-diazabicyclooctane (DABCO).A plot of -1 vs. -1 for different DABCO concentrations showed a common intercept, suggesting that DABCO quenched singlet oxygen generated by light excitation of 4-8.

CHEMISTRY OF SINGLET OXYGEN. PART 44: MECHANISM OF PHOTOOXIDATION OF 2,5-DIMETHYLHEXA-2,4-DIENE AND 2-METHYL-2-PENTENE.

Solvent and temperature effects on the singlet oxygen oxidations of 2,6-dimethyl-2,4-hexadiene (DMHD) and 2-methyl-2-pentene (2M2P) are studied. It is concluded that the initial interaction between 2M2P and **1O//2 (which gives only ene products) and that between DMHD and **1O//2 (which gives ene products, dioxetane, and nonreactive quenching) are identical. It is also suggested that the quenching path for DMHD could involve formation of an intermediate zwitterion or 1,4-biradical, which undergoes intersystem crossing and decays to ground-state oxygen and DMHD.

Quenching of Singlet Oxygen by 1,3,5-Triaryl-2-pyrazolines

The efficient quenching of photochemically generated singlet oxygen by four 1,3,5-triaryl-2-pyrazolines (5-8) and p-(diethylamino)benzaldehyde diphenylhydrazone (9) has been investigated by inhibition of the photosensitized oxygenation of 1,3 diphenylisobenzofuran and 2-methyl-2-pentene. 1-Phenyl-3--5--2-pyrazoline (8) quenches singlet oxygen without any reaction at all, and the quenching rate constant reaches a maximum of 5.8 x 109 M-1 s-1.The quenching ability correlates with the value of their one-electron oxidation potentials (Ep).

Studies on the Autoxidation of Branched-chain Olefins. I. Autoxidation of 2-Methylalk-1-enes and 2-Methylalk-2-enes

The products of the autoxidation of 2-methylpent-1-ene, 2-methylpent-2-ene, 2-methylhex-1-ene, 2-methylhex-2-ene, 2,4,4-trimethylpent-1-ene, and 2,4,4-trimethylpent-2-ene were analyzed by gas chromatography.The identification of the products corresponding to the individual peaks was possible by comparison with authentic substances or by preparative gaschromatographic separation and n.m.r.-spectroscopy of the isolated samples.In this way not only the epoxides and the products of the oxidative cleavage of the C=C double bond but also the allylic alcohols formed by LiAlH4-reduction of the oxidation mixtures could be identified and analyzed.From the results the compositions of the original oxidation mixtures were calculated.