37593-06-9Relevant academic research and scientific papers
Syndiospecific synthesis of longer p-n-alkyl-substituted polystyrenes using monocyclopentadienyl-type titanium catalysts
Quirk, Roderic P.,Ok, Myung-Ahn
, p. 3976 - 3982 (2007/10/03)
Substituted styrenes with linear alkyl substituents (C6 to C12) at the para position on the ring were synthesized and polymerized using the (Me)5CpTi(OMe)3/MAO catalytic system. Increased polymerization activiti
Nouveaux diamino-3,4 phenylalcanes et leur transformation en benzimidazolemethanethiols-2
Krati, Noureddine,Roizard, Denis,Brembilla, Alain,Lochon, Pierre
, p. 443 - 448 (2007/10/02)
We report five o-phenylenediamines which are substituted by an aliphatic chain containing n carbon atoms (n = 4, 6, 8, 10, 12).We describe a well adapted general synthetic method using Schmidt's reaction.The diamines were then transformed into 2-benzimidazolemethanethiols and their related S-methyl derivatives which structures were checked by (1)H NMR.
DETHIOACETALISATION DE DITHIANNES-1,3 PAR DES TRIBROMURES DE PHOSPHONIUM
Cristau, Henri-Jean,Bazbouz, Akram,Morand, Philippe,Torreilles, Eliane
, p. 2965 - 2966 (2007/10/02)
Methyltriphenylphosphonium tribromide 1 acts as an efficient mild dethioketalization reagent with high selectivity for 2-phenyl and 2-vinyl 1,3-dithiannes 2 versus 2-alkyl 1,3-dithiannes and without any secondary bromination reaction of the investigated substrates.The reaction was also succesful with trimethylphenylammonium tribromide.
The Synthesis of 3-Aryl-6-alkylpyridazines
Liang, Jason
, p. 1297 - 1299 (2007/10/02)
Nine compounds of general structure R-X-Y-R' where X is a para-disubstituted phenyl ring and Y is a 3,6-disubstituted-pyridazine ring were synthesized.These can be used as liquid crystal dopents.A general procedure for their synthesis was developed.N-Alkyl benzene and ethyl butyrylacetate were used as starting materials.The purification of reaction intermediates was not necessary if preparative hplc was used to purify the final products.Very pure materials were obtained with good yield.Their structure was confirmed by carbon 13 nmr.
Multiple Melting Behaviour in Square-planar trans-Bis-(1-p-n-alkylphenylbutane-1,3-dionato)copper(II) - The Effect of Alkyl Chain Length
Ohta, Kazuchika,Jiang, Guang-Jie,Yokoyama, Masaaki,Kusabayashi, Shigekazu,Mikawa, Hiroshi
, p. 283 - 294 (2007/10/02)
The title complexes having different n-alkyl groups from methyl to dodecyl have synthesized.All these complexes exhibit solid polymorphism.The number of polymorphs depends on the length of the alkyl chain: two for n (the number of carbon atoms) = 0-2, three for n = 3-5 and 12, and four for n = 6-11, respectively.Each polymorphic form except those with the highest m.p.s. exhibits multiple melting behaviour: double melting for n = 0-5,8, and 12, and triple melting for n = 6-11 except 8.The m.p.s. of the complexes with alkyl groups of odd carbon atoms are higher than those with even atoms, while the respective ligand solids show the opposit e even-odd effect in their m.p.s.
Study of the Influence of Molecular Length on the Characteristics of the Ordered Smectic Phase.
Benattar,Levelut,Strzelecki
, p. 1233 - 1240 (2007/10/05)
Study of DTA and X-rays of p-phenyl-benzylidene-p'-alkylanilines of mesomorphic phases demonstrates the predominant role of the aliphatic chain length. In effect, it governs the appearance of the different phases; the correlation between layers decreases for greater chain lengths. The nonlinear variations of SmB layer thickness for these compounds shows clearly the importance of steric effects coupled with the molecular length with respect to the dipolar effect.
