Mesomorphic Esters of 4-Alkyl(aryl)cyclohexenecarboxylic Acids. Synthesis and Properties

Crystal structure of 5-(4-tert-butoxyphenyl)-3-(4-n-octyloxyphenyl)-4,5-dihydroisoxazole

“…Previously we have demonstrated that [3 + 2] 1,3-dipolar cycloaddition of arylnitrile oxide to alkene is a excellent route to access different 3,5-disubstituted isoxazolines (Tavares et al, 2010(Tavares et al, , 2016Fritsch & Merlo, 2016;Lopes et al, 2018). Using this methodology, a collection of isoxazolines can be constructed with specific applications ranging from biological compounds through use as intermediates in organic synthesis to liquid-crystal materials (El-Khatatneh et al, 2017;Fader & Carreira, 2004;Bezborodov et al, 2004). With this purpose in mind, we have established a concise route to the synthesis of liquid crystals based on isoxazolines and their full characterization.…”

Prospects of the Development of New Approaches of the Preparation of Anisotropic Compounds and Materials

“…The 3,6-disubstituted cyclohex-2-enones (I) with different combinations of cyclic, bridge, terminal fragments and lateral substituents can be prepared in a high yield and in a "one pot procedure" by the condensation of the corresponding Mannich salts or 2-chloro(bromo)ethylaryl(alkyl)ketones with 2-substituted acetoacetic esters, 4-substituted methylbenzylketones or other β-dicarbonylic compounds in the presence of potassium hydroxide in a boiling dioxane [23]. The following catalytic hydrogenation of the cyclohex-2-enones (I) in the presence of 10% palladium on charcoal and potassium hydroxide in isopropanol or THF-isopropanol mixture leads to the appropriate trans-2,5-disubstituted cyclohexanones (II) (Scheme 1).…”

“…Derivatives of terphenyls and quaterphenyl(18)(19)(20)(21)(22)(23)(24)(25).Scheme 7. Preparation of LC compounds(26,(28)(29)(30) …”

“…22 August 2015 New Approaches of the Preparation of Anisotropic Compounds and Materials [613]/147products of their transformations were prepared according to published methods[17][18][19][20][21][22][23][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”