Synthesis of New Liquid Crystals with 2,3,4,9-Tetrahydro-1<i>H</i>-Fluorene Moiety
作者:R. Ch. Geivandov、V. Mezhnev、T. Geivandova
DOI:10.1080/15421406.2011.570542
日期:2011.6.30
A new range of liquid crystals containing the 2,3,4,9-tetrahydro-1H-fluorene system have been prepared and its thermal properties were examined. The mesomorphic properties are compared with those of the fluorene and trans-cyclohexane derivatives. Introduction of 2,3,4,9-tetrahydro-1H-fluorene in typical liquid crystal structure leads to decrease of melting point and the clearing point values. The chemical structures and mesogenic properties for the reported novel compounds are discussed.
A new synthetic approach towards 7-substituted 2-alkyl-2,3,4,9-tetrahydro-1H-fluorenes
作者:V. V. Mezhnev、R. Ch. Geivandov
DOI:10.1007/s11172-011-0325-2
日期:2011.10
Cyclization of 2-(4-bromophenyl)-5-pentylcyclohex-1-ene-1-carboxylic acid followed by reduction of the carbonyl group resulted in the corresponding 7-substituted derivative of 2-alkyl-2,3,4,9-tetrahydro-1H-fluorene.