68349-64-4Relevant academic research and scientific papers
Organic solvent controlling the oxidativity of potassium permanganate
Zheng, Min-Yan,Wei, Yong-Sheng,Fan, Guang,Huang, Yi
experimental part, p. 161 - 164 (2012/08/27)
It has been discovered that potassium permanganate can be a homogenous weak oxidant in organic solvent without the addition of water. If acetone is employed as the only solvent, among some common organic substrates included alkenes, alcohols, arenes, aldehydes and phenols, secondary alcohols are converted to the corresponding ketones and aldehydes to the corresponding acid. Compared with oxidation reaction of potassium permanganate in water, in anhydrous acetone system, potassium permanganate as a weaker oxidant has no influence on the alkyls in benzene rings, double bonds and so on. So potassium permanganate can exhibit selectivity by solvent controlling. Especially, when aldehydes are oxidized, the oxidation process is a green organic reaction for nearly all coproducts and solvent can be recycled.
Synthesis and mesomorphic properties of fluorinated Schiff's base esters containing alkyl and alkoxy end groups
Wei, Qiang,Yang, Huai,Wang, Yanbin
experimental part, p. 31 - 38 (2010/03/03)
Two series of fluorinated Schiff's base esters have been synthesized and characterized. Their chemical structures were identified by FTIR, 1H NMR, and elemental analysis (EA). Their mesomorphic properties were studied by polarizing optical, microscopy (PO
Liquid-Crystalline Heterocycloalkanes. III. Synthesis and Liquid-Crystalline Properties of Substituted 1,3-Dioxadecalines
Tschierske, C.,Zaschke, H.
, p. 1 - 14 (2007/10/02)
Liquid-crystalline 2-substituted and 2,6-disubstituted 1,3-dioxadecalines (4-6) were synthesized by acid-catalyzed acetalization of trans-2-hydroxymethylcyclohexanol (1) or trans-4-alkyl-trans-2-hydroxymethylcyclohexanoles (2) with aldehydes 3 whereby the desired trans-isomers were formed only.The syntheses of the various aldehydes are also described.Special attention is drawn on the evolution of mesogenic properties of the title compounds 4-6 in comparison with known decalines and 1,3-dioxanes.It was found that the clearing temperatures of the synthesized 1,3-dioxadecalines are always lower than those of the corresponding decaline derivatives, due to the deformation of the decaline-ringsystem by the introduction of two oxygen-atoms.The comparison of 1,3-dioxanes and 1,3-dioxadecalines shows that the dioxadecaline ringsystem tends to suppress smectic mesophases in favour of nematics.A first example of a liquid crystalline cis-fused 1,3-dioxadecaline (8) is described, too.
Broad Nematic Phases with High Clearing Points
Osman, Maged A.
, p. 2450 - 2452 (2007/10/02)
Unbranched 4-(4'-alkylbenzoyloxy)-, 4-(4'-methylaminobenzoyloxy)- and 4-(4'-dimethylaminobenzoyloxy)benzylidene-4''-cyanoanilines were synthesized.They show broad nematic phases with high nematic isotropic transitions.Lateral Cl-substituents decrease the
