2-Thiazoline Amide Derivatives as Liquid Crystals

2-Thiazoline Amide Derivatives as Liquid Crystals

Schneider, Juliana M. F. M.; Schneider, Paulo H.; Merlo, Aloir A.

Abstract:

In recent years, promising materials incorporating five or six membered heterocyclic derivatives as core unit or terminal moiety have attracted great attention.The heterocyclic unit has the ability to impart lateral and/or longitudinal dipoles coupled with changes in molecular shapes. On the other hand, ferroelectric liquid crystals have attracted special interest because these materials exhibit a large spontaneous polarization and a fast response to an applied electric field. Compounds containing the 2-thiazolinic ring may aggregate both parameters to the final mesogens since they display an asymmetric carbon in their structure. However, these compounds have not been reported yet as liquid crystals materials although they may afford an interesting possibility for the study of mesomorphic behavior, as different groups can be inserted at positions 2 and 4 of the ring. Thus, we report in this work the design and synthesis of a new class of chiral liquid crystals containing the 2-thiazoline heterocycle (figure 1) as well as the initial studies of their mesomorphic behavior.

In recent years, promising materials incorporating five or six membered heterocyclic derivatives as core unit or terminal moiety have attracted great attention.The heterocyclic unit has the ability to impart lateral and/or longitudinal dipoles coupled with changes in molecular shapes. On the other hand, ferroelectric liquid crystals have attracted special interest because these materials exhibit a large spontaneous polarization and a fast response to an applied electric field. Compounds containing the 2-thiazolinic ring may aggregate both parameters to the final mesogens since they display an asymmetric carbon in their structure. However, these compounds have not been reported yet as liquid crystals materials although they may afford an interesting possibility for the study of mesomorphic behavior, as different groups can be inserted at positions 2 and 4 of the ring. Thus, we report in this work the design and synthesis of a new class of chiral liquid crystals containing the 2-thiazoline heterocycle (figure 1) as well as the initial studies of their mesomorphic behavior.

Palavras-chave:

DOI: 10.5151/chempro-14bmos-R0051-1

Referências bibliográficas

• [1] 1 (a) Lai, C. K. et. al. Tetrahedron, 2011, 67, 114. (b) Gallardo, H. et. al. Tetrahedron Lett. 2009, 50, 905.
• [2] 2 Collins, P. J. Journal of the Franklin Institute, 2005, 342, 599.
• [3] 3 Tschierske, C. et. al. J. Mater. Chem. 2011, 21, 5307.
• [4] 4 Marcelli, T. Angew. Chem. Int. Ed. 2010, 49, 684.

Como citar:

Schneider, Juliana M. F. M.; Schneider, Paulo H.; Merlo, Aloir A.; "2-Thiazoline Amide Derivatives as Liquid Crystals", p-51-51. In: In Blucher Chemistry Proceedings, São Paulo, v. 1, n. 1, Setembro.2013. São Paulo: Blucher, 2013.
ISSN 23184043, DOI 10.5151/chempro-14bmos-R0051-1