Propargylic alcohols
and amines are versatile building blocks in
organic synthesis. We demonstrate a straightforward enzymatic cascade
to synthesize enantiomerically pure propargylic alcohols and amines
from readily available racemic starting materials. In the first step,
the peroxygenase from
Agrocybe aegerita
converted
the racemic propargylic alcohols into the corresponding ketones, which
then were converted into the enantiomerically pure alcohols using
the (
R
)-selective alcohol dehydrogenase from
Lactobacillus kefir
or the (
S
)-selective
alcohol dehydrogenase from
Thermoanaerobacter brokii
. Moreover, an enzymatic Mitsunobu-type conversion of the racemic
alcohols into enantiomerically enriched propargylic amines using (
R
)-selective amine transaminase from
Aspergillus
terreus
or (
S
)-selective amine transaminase
from
Chromobacterium violaceum
was established. The
one-pot two-step cascade reaction yielded a broad range of enantioenriched
alcohol and amine products in 70–99% yield.
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