LOW TRANSITION TEMPERTURE LIQUID CRYSTALLINE AMINES INCORPORATING THE BIPHENYL RING SYSTEM.
N-(n-butyl)-4-n-pentyl-4 prime -biphenylamine has an enantiotropic smectic A phase between 45 and 78 degree . 4-n-pentyl-4 prime -biphenylmethanamine has a monotropic smectic phase from 63-56 degree . These compounds, together with the previously reported phenylcyclohexane analogs, are the first examples of liquid crystalline amines not involving intramolecular hydrogen bonding or extensive conjugative interactions.
Efficient nitrile hydration mediated by RuII catalysts in micellar media
Efficient nitrile hydration to the corresponding amide derivatives is observed in water using poorly soluble [RuCl2(η6- arene)(PR3)] catalysts 1 with the aid of surfactants to ensure substrate and catalyst solubilization, and enabling ligand effect study on catalytic activity. Amide yields of 40 to 95% can be observed with a variety of aromatic and aliphatic nitriles using the optimized catalyst system, [RuCl 2(p-cymene)(PPh2OEt)]/Triton X-114. Catalyst separation and recycling is possible.
Cavarzan, Alessandra,Scarso, Alessandro,Strukul, Giorgio
experimental part
p. 790 - 794
(2010/09/05)
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