Liquid crystals derived from carbohydrates: Synthesis and properties of oxadecaline compounds

✍ Scribed by Vill, Volkmar ;Tunger, Hanns-Walter

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 455 KB
• Volume: 1995
• Category: Article
• ISSN: 0947-3440
• DOI: 10.1002/jlac.1995199506149

✦ Synopsis

Abstract

Reaction of glucal 1 with alkoxybenzene leads after hydrogenation and deacetylation to β‐C glycosides 4, which can be used as chiral compounds in the synthesis of chiral calamitic liquid crystals. The combination with aliphatic aldehydes leads to liquid crystals 5 showing a monotropic S~A~ phase, with aromatic p‐alkoxy‐substituted aldehydes to compounds 6 with enantiotropic cholesteric and S~A~ phases. Reaction with p‐alkoxy‐substituted phenylboronic acids gives liquid crystals 7 forming S~A~ and ferroelectric S~C~* phases. They all exhibit a high twisting power and blue phases in contact preparation.