Université de Neuchâtel

Olefin Cross-Metathesis: a Versatile Synthetic Reaction for the Design of Janus Liquid Crystals

Trinh, Thi Minh Nguyet ; Nguyen, Thanh Tung ; Kopp, Cyril ; Pieper, Pauline ; Russo, Virginie ; Heinrich, Benoît ; Donnio, Bertrand ; Nguyen, Thi Le Anh ; Deschenaux, Robert

In: European Journal of Organic Chemistry, 2015, vol. 2015, no. 27, p. 6005-6010

The olefin cross-metathesis reaction using the second-generation Grubbs catalyst was employed to prepare non-symmetrical thermotropic liquid crystals from various mesomorphic or nonmesomorphic type I and type II olefinic constructs, including linear, chiral, dendritic and ferrocenyl olefins. Smectic C, smectic A and nematic phases, as well as chiral smectic A and chiral nematic phases were...

Université de Neuchâtel

Preparation of Pillar[5]arene-Based [2]Rotaxanes from Acyl Chlorides and Amines

Milev, Radian ; Lopez-Pacheco, Alberto ; Nierengarten, Iwona ; Trinh, Thi Minh Nguyet ; Holler, Michel ; Deschenaux, Robert ; Nierengarten, Jean-François

In: European Journal of Organic Chemistry, 2015, vol. 2015, no. 3, p. 479-485

Pillar[5]arene-based [2]rotaxanes have been prepared from the reactions of diacyl chloride reagents with various amine stoppers. The yields of the [2]rotaxanes are sensitive to the reaction conditions (solvent and stoichiometry) as well as to structural and electronic factors. In particular, the nature of the starting amine reagent has a dramatic influence on the yields of [2]rotaxanes; thus,...