Grunwald, Marco Andre published the artcileColumnar Propeller-Like 1,3,5-Triphenylbenzenes: Probing the Effect of Chlorine on the Suzuki Cross-Coupling and Liquid Crystalline Properties, Category: chlorides-buliding-blocks, the publication is European Journal of Organic Chemistry (2020), 2020(15), 2190-2198, database is CAplus.
Suzuki cross-couplings either between chlorinated N-methyliminodiacetic acid (MIDA)-protected aryl boronates and 1,3,5-tribromobenzene or between chlorinated aryl bromides and phenyltrisboronic species to star-shaped 1,3,5-triphenylbenzenes with different substitution patterns and chloro substituents at the outer Ph rings were studied. The chlorinated precursors required for the resp. reaction were synthesized and characterized. Depending on the used coupling reaction target triphenylbenzenes were isolated in yields between 42% and 88%. Their mesomorphic properties were influenced by the substitution pattern and number of peripheral chlorine atoms. Triphenylbenzene with 3,5-alkoxy substitution and H in para-position self-assembled into either columnar hexagonal (Colh) mesophases or a soft crystal. While threefold chloro substitution in meta-position of the outer Ph rings led to stable room temperature Colho phases, triphenylbenzenes with threefold para-chloro or 3,5-dichloro substitution were non-mesomorphic. Based on x-ray diffraction data a helical packing model for the observed phases similar to that of related alkoxy-substituted triphenylbenzenes is proposed.
European Journal of Organic Chemistry published new progress about 19652-33-6. 19652-33-6 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Bromide,Benzene,Phenol,Aldehyde, name is 5-Bromo-3-chloro-2-hydroxybenzaldehyde, and the molecular formula is C7H4BrClO2, Category: chlorides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics