Synthesis of new liquid-crystalline compounds from the 3-aryl-5-alkylpyrazole series
摘要:
A method was developed for the preparation of new liquid-crystalline substances, pyrazole derivatives, through the corresponding 2-isoxazolines and isoxazoles. The hydrogenolysis of the heterocycle in 3-(4-hydroxyphenyl)-5-amylisoxazole afforded 1-amino- 1-(4-hydroxyphenyl)-1-octen-3-one. The acid hydrolysis of the compound followed by treating with hydrazine hydrate resulted in 5-amyl-3-(4-hydroxyphenyl)-1H-pyrazole, whose benzylation and esterification with the corresponding mesogenous benzyl chlorides and benzoyl chlorides provided liquid-crystalline 5-alkyl-3-aryl-1H-pyrazoles.
Synthesis of new liquid-crystalline compounds from the 3-aryl-5-alkylpyrazole series
摘要:
A method was developed for the preparation of new liquid-crystalline substances, pyrazole derivatives, through the corresponding 2-isoxazolines and isoxazoles. The hydrogenolysis of the heterocycle in 3-(4-hydroxyphenyl)-5-amylisoxazole afforded 1-amino- 1-(4-hydroxyphenyl)-1-octen-3-one. The acid hydrolysis of the compound followed by treating with hydrazine hydrate resulted in 5-amyl-3-(4-hydroxyphenyl)-1H-pyrazole, whose benzylation and esterification with the corresponding mesogenous benzyl chlorides and benzoyl chlorides provided liquid-crystalline 5-alkyl-3-aryl-1H-pyrazoles.
Synthesis of new metallomesogens with enaminoketone chelating ligands
作者:V. N. Kovganko、N. N. Kovganko
DOI:10.1134/s1070428006060169
日期:2006.6
New liquid crystalline copper(II) enaminoketonates containing bridging ester groups were synthesized by hydrogenation of the heteroring in 3-(4-hydroxyphenyl)-5-pentylisoxazole to 1-amino-1-(4-hydroxyphenyl)oct- 1-en-3-one, treatment of the latter with copper(II) acetate, and benzoylation of the coordination compound thus formed with 4-alkoxybenzoyl chlorides.
Synthesis of new liquid-crystalline compounds from the 3-aryl-5-alkylpyrazole series
作者:V. N. Kovganko、N. N. Kovganko
DOI:10.1134/s1070428006050083
日期:2006.5
A method was developed for the preparation of new liquid-crystalline substances, pyrazole derivatives, through the corresponding 2-isoxazolines and isoxazoles. The hydrogenolysis of the heterocycle in 3-(4-hydroxyphenyl)-5-amylisoxazole afforded 1-amino- 1-(4-hydroxyphenyl)-1-octen-3-one. The acid hydrolysis of the compound followed by treating with hydrazine hydrate resulted in 5-amyl-3-(4-hydroxyphenyl)-1H-pyrazole, whose benzylation and esterification with the corresponding mesogenous benzyl chlorides and benzoyl chlorides provided liquid-crystalline 5-alkyl-3-aryl-1H-pyrazoles.