19781-07-8Relevant articles and documents
The Development of Synthetic Routes to 1,1,n,n-Tetramethyl[n](2,11)teropyrenophanes
Unikela, Kiran Sagar,Merner, Bradley L.,Ghasemabadi, Parisa Ghods,Warford, C. Chad,Qiu, Christopher S.,Dawe, Louise N.,Zhao, Yuming,Bodwell, Graham J.
, p. 4546 - 4560 (2019)
A concise synthetic approach to 1,1,n,n-tetramethyl[n](2,11)teropyrenophanes has been developed. It involves the construction of triply-bridged pyrenophanes, during which the three bridges are installed successively using Friedel-Crafts alkylation, Wurtz coupling and McMurry reactions. At the same time, the innate regiochemical preferences of pyrene toward electrophilic aromatic substitution are relied upon to control the substitution pattern. A cyclodehydrogenation reaction is then employed to generate the teropyrene system directly in a nonplanar conformation. The crystal structure of 1,1,7,7-tetramethyl[7](2,11)teropyrenophane was determined and the teropyrene system was found to have an end-to-end bend angle of 177.9°.
Boron trifluoride-mediated alkylation of diphenylphosphine with tert-alkyl fluoride
Hirano, Koji,Yorimitsu, Hideki,Oshima, Koichiro
, p. 4873 - 4875 (2007/10/03)
(Chemical Equation Presented) Treatment of tertiary alkyl fluoride with diphenylphosphine in the presence of a stoichiometric amount of boron trifluoride etherate yields the corresponding tert-alkyldiphenylphosphine despite the coexistence of the strong L
A Convenient Synthesis of Acyclic 1,n-Diketones (n=5-8) from 2-t-Butylperoxycycloalkanones
Nishinaga, Akira,Rindo, Katsuhiko,Matsuura, Teruo
, p. 1038 - 1041 (2007/10/02)
The reaction of organolithium with 2-alkyl-2-t-butylperoxycycloalkanones, readily available from t-butylperoxylation of 2-alkylcycloalkanones, gave 2-t-butylperoxy-1-cycloalkanol derivatives quantitatively, thermal decomposition of which with or without an acid afforded 1,n-diketones (n=5-8) in excellent yields.