For instance only Bronsted acid sites can be quantified with this method.
2.
A chiral constrained Bronsted acid developed by Benjamin List works as an asymmetric spiroacetalization catalyst.
3.
These mechanistic studies directed attention to the proton-donor ability ( Bronsted acid ) of the catalyst.
4.
Chiral phosphine MBH catalysts often contain Bronsted acid moiety in their chiral backbones, employing a multifunctional strategy.
5.
The Bronsted acid and base moieties were proposed to be involved in the stabilization of zwitterionic species in a stereoselective manner.
6.
Bronsted acids such as HCl, H 2 SO 4, polyphosphoric acid and p-toluenesulfonic acid have been used successfully.
7.
Asymmetric ion-pairing catalysis is distinct from other covalent types of catalys such as Lewis acid catalysis and Bronsted acid catalysis.
8.
This kind of what so called Bronsted acid-assisted chiral Lewis acid ( BLA ) catalyzes a number of diene-aldehyde cycloaddition reactions.
9.
Such molecules are then said to be " protonated ", and chemically they often, as a result, become so-called Bronsted acids.
10.
The Bronsted acid remains hydrogen-bonded to the resulting enolate in the enolate-addition step to the aldehyde, and finally ensures efficient proton transfer in the rate-determining proton abstraction step.
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