Enantiomeric recognition and interactions

Static and dynamic superheated water extraction of essential oil components from Thymus vulgaris L.

“…2. Moreover, the literature reports confirm that high temperature leads to linalool transformation into p-cymene and 1,8-cineole [33], and promotes the conversion of camphor into borneol [34]. As results from the literature [21,35], the influence of temperature rise on the extraction recovery of essential oil components can also be dependent on their concentration level and on the herb type.…”

Question 4: Basic Questions About the Origin of Life: On Chirobiogenesis

“…The formation of the enantiomorphous and racemic aggregates via interactions of chiral molecules present in non-racemic mixtures, was successfully applied for the amplification of chirality. In particular in systems where the formed enantiomorphic aggregates operate as chiral catalysts for their own formation staring from achiral reactants (Wynberg and Feringa 1976). Girard and Kagan (1998) provided theoretical models that had quantified these nonlinear effects.…”

The Stereochemical Outcomes – the Isoborneol/Borneol Ratios – in Lithium, Sodium and Potassium/Ammonia Reductions without a Proton Source of the Enantiomers and the Racemate of Camphor Differ Strongly

“…This explains why reductions with excess metal under these conditions proceed until the substrates are completely transformed into the corresponding alcoholates. The enolates formed via the disproportionations are protonated by the ammonia (although the equilib- [6] that for non-ideal behavior, reactions involving single molecules of substrate should differ when the enantiomeric and racemic forms are used because these molecules can nevertheless influence each other. Examples would precisely be the reductions of (I R)-1 or (1 S)-1 and (1 RS)-1 via the type of mechanism given by House [ 5 ] .…”