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Enzymes in Nonaqueous Solvents - Methods and Protocols (Hardcover, 2001 ed.)
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Enzymes in Nonaqueous Solvents - Methods and Protocols (Hardcover, 2001 ed.)
Series: Methods in Biotechnology, 15
Expected to ship within 12 - 17 working days
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Enzymatic catalysis has gained considerable attention in recent
years as an efficient tool in the preparation of natural products,
pharmaceuticals, fine chemicals, and food ingredients. The high
selectivity and mild reaction con- tions associated with enzymatic
transformations have made this approach an attractive alternative
in the synthesis of complex bioactive compounds, which are often
difficult to obtain by standard chemical routes. However, the maj-
ity of organic compounds are not very soluble in water, which was
traditi- ally perceived as the only suitable reaction medium for
the application of biocatalysts. The realization that most enzymes
can function perfectly well under nearly anhydrous conditions and,
in addition, display a number of useful properties, e. g. , highly
enhanced stability and different selectivity, has d- matically
widened the scope of their application to the organic synthesis.
Another great attraction of using organic solvents rather than
water as a reaction solvent is the ability to perform synthetic
transformations with re- tively inexpensive hydrolytic enzymes. It
is worth reminding the reader that in vivo, the synthetic and
hydrolytic pathways are catalyzed by different enzymes. However,
elimination of water from the reaction mixture enables the
"reversal" of hydrolytic enzymes and thus avoids the use of the
expensive cofactors or activated substrates that are required for
their synthetic count- parts.
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