20049-04-1Relevant academic research and scientific papers
Isomerization of the constituents of ion/neutral complexes during the fragmentation of protonated dialkyl-substituted 1,3-diphenylpropanes
Kuck, Dietmar,Matthias, Carsten,Barth, Dieter,Letzel, Matthias C.
scheme or table, p. 167 - 174 (2012/07/13)
The fragmentation of gaseous ion/neutral complexes [R+? C6H5CH2CH2CH2C 6H4-R′] with (i) R = R′ = C4H 9, (ii) R = C4H9 and R
Intramolecular carbolithiation promoted by a DTBB-catalysed chlorine-lithium exchange
Yus, Miguel,Ortiz, Rosa,Huerta, Fernando F.
, p. 8525 - 8542 (2007/10/03)
The reaction of 6-chlorohex-1-ene 1 with lithium powder and a catalytic amount of 4,4′-di-tert-butylbiphenyl (DTBB, 5% molar) in THF at -78°C gives the corresponding organolithium intermediate 2, which by reaction with different electrophiles affords, aft
Construction of a Sterically Congested Carbon Framework via 5-Hexenyllithium Cyclization. Synthesis of (+/-)-Cuparene.
Bailey, William F.,Khanolkar, Atmaram D.
, p. 7727 - 7738 (2007/10/02)
The naturally occuring sesquiterpene (+/-)-cuparene , which contains two contiguous quaternary centers, is produced in good yield by 5-exo-trig cyclization of the 5-hexenyllithium (2) generated from 6-iodo-3,3-dimethyl-2-(4-methylphenyl)-1-hexene (3) by low temperature lithium-iodine exchange.In contrast, radical mediated cyclization of 3 proceeds via the 6-endo-trig mode to give 1,1-dimethyl-2-(4-methylphenyl)cyclohexane.
Acid-catalyzed Reactions of Aromatic Hydrocarbons with Alkanes and Cycloalkanes. X. Alkylations with Cyclohexane
Miethchen, Ralf,Steege, Sigrid,Kroeger, Carl-Friedrich
, p. 823 - 834 (2007/10/02)
The complex reaction mixtures of the nonconventional alkylation of benzene with cyclohexane in the presence of Lewis/proton acids and promotors were investigated by gas-liquid chromatography and mass spectrometry.Four representative groups of hydrocarbons were found including cycloalkylbenzenes, substituted indanes or tetralines (C12H16), C1-C6-alkylbenzenes and isomeric biscycloalkyls (C12H22).Their formation is interpreted as a competition between alkylation, (without or with isomerization), ringfission with cycloalkylation or fragmentation, and self-alkylation; phenylcycloalkylcations and phenylalkylcations are the intermediates.
