Examples of 'phase transfer catalyst' in a sentence
Meaning of "phase transfer catalyst"
phase transfer catalyst: A substance that aids in the transfer of reactants from one phase to another during a chemical reaction. It is often used in organic synthesis to facilitate reactions between immiscible substances
How to use "phase transfer catalyst" in a sentence
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phase transfer catalyst
A phase transfer catalyst can be employed herein.
There is also employed a phase transfer catalyst.
The phase transfer catalyst is used in catalytic amounts.
It is also frequently advantageous to employ a phase transfer catalyst.
Advantageously a phase transfer catalyst is also added.
Phase transfer catalyst recovery.
The presence of the phase transfer catalyst is critical.
A phase transfer catalyst may be used.
The reaction is advantageously catalyzed by a conventional phase transfer catalyst.
The phase transfer catalyst can be ionic or neutral.
Tetrabutylammonium bromide is generally the preferred phase transfer catalyst.
It is also used as a phase transfer catalyst and as a mild base.
The reaction is conducted in the presence of a phase transfer catalyst.
In one embodiment the phase transfer catalyst is tetrabutylammonium bromide.
Also present in the reaction mixture is a phase transfer catalyst.
See also
The amount of phase transfer catalyst can vary widely.
The reaction is performed in the presence of a phase transfer catalyst.
It is preferable to add a phase transfer catalyst to the methylation reaction.
Preferably the process is performed using a phase transfer catalyst.
The preferred phase transfer catalyst used was tetraethylammonium chloride.
The reactions can be run without a phase transfer catalyst.
The preferred phase transfer catalyst is benzyltriethyl ammonium chloride.
The efficiency of the reaction is improved by inclusion of a phase transfer catalyst.
Suitably the phase transfer catalyst is a quaternary salt or a crown ether.
The reaction is carried out in the presence of a phase transfer catalyst.
A phase transfer catalyst such as a tetraalkylammonium halide salt is preferably included.
A quaternary ammonium salt may be used as the phase transfer catalyst.
Phase transfer catalyst and heteropolytungstate are preferably fed separately in step a.
Inorganic bases are preferably used in the presence of a phase transfer catalyst.
The phase transfer catalyst facilitates the reaction of these dissimilar components.
Embodiments of this aspect may include using a phase transfer catalyst.
Any phase transfer catalyst known to one skilled in the art is suitable.
The fluorination reaction may be conducted in the presence of a phase transfer catalyst.
It is also possible to use a phase transfer catalyst such as tetrabutyl ammonium bromide.
Inorganic bases can be used alone or in the presence of a phase transfer catalyst.
As the phase transfer catalyst may be used an ordinary quaternary ammonium salt.
Addition of tetrabutylammonium bromide as a phase transfer catalyst dramatically increases the rate of reaction.
A phase transfer catalyst such as tetrabutylammonium chloride may be added but is not essential.
The oxindole can be converted to an enantiomeric mixture using an achiral phase transfer catalyst.
More preferably the phase transfer catalyst is a quaternary ammonium salt or a crown ether.
The reaction product has to be purified by recrystallisation to eliminate the phase transfer catalyst.
In this case a phase transfer catalyst was used to increase the speed of the reaction.
The process may further comprise adding at least one phase transfer catalyst.
The phase transfer catalyst can be selected from a wide range of known compounds.
This reaction mixture can further comprise a quaternary ammonium phase transfer catalyst.
The phase transfer catalyst preferably is introduced to the reaction at the inception thereof.
The fluorination reaction is conveniently and preferably conducted in the presence of a phase transfer catalyst.
The phase transfer catalyst is a compound that promotes reaction between compounds in different phases.
Preferably the quaternary ammonium salt is a phase transfer catalyst and especially benzyl triethylammonium azide.
The phase transfer catalyst facilitates the reaction of these dissimilar and incompatible components.
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