78989-55-6Relevant academic research and scientific papers
Synthesis and Properties of Optically Active Phenoxypropionates. Effect of Halogeno Substituent in the Core on Physical Properties
Sugita, Shin-Ichi,Toda, Susumu,Yoshiyasu, Takashi,Teraji, Tsutomu
, p. 399 - 406 (2007/10/02)
Chiral phenoxypropionates having halogenated 2,5-diphenylpyrimidine cores were synthesized and the effect of a halogeno-substituent on the physical properties such as mesomorphic behavior, spontaneous polarization (Ps) and response time (τ) were investigated.The introduction of a halogen atom to the phenyl ring of 2,5-diphenylpyrimidine core led to a decrease in the thermal stability of mesophases.The Ps values in the achiral host liquid crystal mixture were increased by introducing the halogen atom.However, response times were not improved. - Keywords: ferroelectric liquid crystal, phenoxypropionate, halogeno-substituent
Process of preparation of racemic hydroxyarylglycolic acids and novel products resulting therefrom
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, (2008/06/13)
The invention relates to a process of preparation of racemic hydroxyarylglycolic acids and the novel products resulting therefrom. According to such process glyoxylic acid is condensed in water in the presence of an alkaline agent at a temperature of between 35° and 100° C., on an excess, or not, of phenolic aromative derivative other than phenol, having at least one proton on either of the ortho or para positions with respect to the phenol function. Application to the production of novel acids such as 4-hydroxy 3-tertiobutyl mandelic acid, 2-hydroxy 5-tertiobutyl mandelic acid, 3-chloro 4-hydroxy mandelic acid, 2-fluoro 4-hydroxy mandelic acid, monohydrated 3,5-dimethoxy 4-hydroxy mandelic acid, 2-hydroxy 5-methyl mandelic acid, (1-hydroxy 2-naphthyl) glycolic acid, 4-ethyl 2-hydroxy mandelic acid, and 4-hydroxy 3-methyl mandelic acid.
