Abstract
Chiral
amines
are
valuable
building
blocks
in
the
manufacture
of
agrochemicals,
pharmaceuticals,
natural
products,
fine
chemicals,
functional
materials
among
others.
Compared
to
asymmetric
hydrogenation
imines/enamides
and
biocatalytic/organocatalytic
reductive
amination,
transition
metal
catalyzed
direct
hydrogenative
amination
reactions
(DAHA)
using
molecular
dihydrogen
as
reductant
highly
economical,
atom
and/or
step‐efficient
thus
attractive
for
researchers
from
both
industry
academia.
In
previous
reviews,
catalysts/methods
development,
applications
synthesis
pharmaceuticals
[N]
source
were
summarized
discussed.
this
review,
we
summarize
discuss
ketone
substrates
scope
upon
utilizing
state‐of‐the‐art
catalysts.
The
substrate
limitations,
potential
key
mechanisms
also
critically
concluded.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(6), С. 2828 - 2850
Опубликована: Янв. 1, 2024
Biocatalysis
has
become
an
important
tool
in
chemical
synthesis,
allowing
access
to
complex
molecules
with
high
levels
of
activity
and
selectivity
low
environmental
impact.
Key
discoveries
protein
engineering,
bioinformatics,
recombinant
technology
DNA
sequencing
have
contributed
towards
the
rapid
acceleration
field.
This
tutorial
review
explores
enzyme
engineering
strategies
high-throughput
screening
approaches
that
been
applied
for
discovery
development
enzymes
synthetic
application.
Landmark
developments
field
are
discussed
carefully
selected
highlight
diverse
applications
within
pharmaceutical,
agricultural,
food
industries.
The
design
artificial
biocatalytic
cascades
is
also
examined.
will
give
readers
insight
into
landmark
milestones
helped
shape
grow
this
branch
catalysis
since
first
enzyme.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(36)
Опубликована: Июнь 17, 2024
Abstract
This
review
analyzes
a
development
in
biochemistry,
enzymology
and
biotechnology
that
originally
came
as
surprise.
Following
the
establishment
of
directed
evolution
stereoselective
enzymes
organic
chemistry,
concept
partial
or
complete
deconvolution
selective
multi‐mutational
variants
was
introduced.
Early
experiments
led
to
finding
mutations
can
interact
cooperatively
antagonistically
with
one
another,
not
just
additively.
During
past
decade,
this
phenomenon
shown
be
general.
In
some
studies,
molecular
dynamics
(MD)
quantum
mechanics/molecular
mechanics
(QM/MM)
computations
were
performed
order
shed
light
on
origin
non‐additivity
at
all
stages
an
evolutionary
upward
climb.
Data
used
construct
unique
multi‐dimensional
rugged
fitness
pathway
landscapes,
which
provide
mechanistic
insights
different
from
traditional
landscapes.
Along
related
line,
biochemists
have
long
tested
result
introducing
two
point
enzyme
for
reasons,
followed
by
comparison
respective
double
mutant
so‐called
cycles,
showed
only
additive
effects,
but
more
recently
also
uncovered
cooperative
antagonistic
non‐additive
effects.
We
conclude
suggestions
future
work,
call
unified
overall
picture
epistasis.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(20), С. 14278 - 14286
Опубликована: Май 10, 2024
The
development
of
catalysts
serves
as
the
cornerstone
innovation
in
synthesis,
exemplified
by
recent
discovery
photoenzymes.
However,
repertoire
naturally
occurring
enzymes
repurposed
direct
light
excitation
to
catalyze
new-to-nature
photobiotransformations
is
currently
limited
flavoproteins
and
keto-reductases.
Herein,
we
shed
on
imine
reductases
(IREDs)
that
remote
C(sp3)–C(sp3)
bond
formation,
providing
a
previously
elusive
radical
hydroalkylation
enamides
for
accessing
chiral
amines
(45
examples
with
up
99%
enantiomeric
excess).
Beyond
their
natural
function
catalyzing
two-electron
reductive
amination
reactions,
upon
visible-light
or
synergy
synthetic
photoredox
catalyst,
IREDs
are
tune
non-natural
photoinduced
single-electron
processes.
By
conducting
wet
mechanistic
experiments
computational
simulations,
unravel
how
engineered
intermediates
toward
productive
enantioselective
pathway.
This
work
represents
promising
paradigm
harnessing
nature's
asymmetric
transformations
remain
challenging
through
traditional
chemocatalytic
methods.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(41)
Опубликована: Июль 17, 2024
Axially
chiral
biaryl
compounds
are
ubiquitous
scaffolds
in
natural
products,
bioactive
molecules,
ligands
and
catalysts,
but
biocatalytic
methods
for
their
asymmetric
synthesis
limited.
Herein,
we
report
a
highly
efficient
route
the
atroposelective
of
biaryls
by
dynamic
kinetic
resolution
(DKR).
This
DKR
approach
features
transient
six-membered
aza-acetal-bridge-promoted
racemization
followed
an
imine
reductase
(IRED)-catalyzed
stereoselective
reduction
to
construct
axial
chirality
under
ambient
conditions.
Directed
evolution
IRED
from
Streptomyces
sp.
GF3546
provided
variant
(S-IRED-Ss-M11)
capable
catalyzing
process
access
variety
aminoalcohols
high
yields
excellent
enantioselectivities
(up
98
%
yield
>99
:
1
enantiomeric
ratio).
Molecular
dynamics
simulation
studies
on
S-IRED-Ss-M11
revealed
origin
its
improved
activity
atroposelectivity.
By
exploiting
substrate
promiscuity
IREDs
power
directed
evolution,
our
work
further
extends
biocatalysts'
toolbox
challenging
axially
molecules.
ACS Catalysis,
Год журнала:
2024,
Номер
14(4), С. 2685 - 2695
Опубликована: Фев. 7, 2024
Although
amine
dehydrogenases
(AmDHs)
are
emerging
as
attractive
biocatalysts
for
chiral
synthesis,
their
synthetic
application
in
structurally
diverse
arylamines
remains
challenging,
given
the
limited
substrate
acceptance.
Substrate
walking
is
an
effective
coevolution
strategy
to
confer
targeted
acceptance
enzyme
through
a
stepwise
mutagenesis
landscape
adaptation.
Here,
based
on
conventional
strategy,
we
report
shield
machine-like
quickly
evolve
F-BbAmDH
from
Bacillus
badius
accessing
difficult-to-aminate
fused-ring
and
linked-ring
aryl
ketones.
A
set
of
monoring
ketone
homologues
with
benzene
ring
located
at
end
side-chain
regularly
extended
carbon
skeletons
was
rationally
selected
transition
substrates.
superior
mutant
library
expanded
target
identified
activity
specificity
enhancement
substrates,
enabling
synthesis
pharmaceuticals
bioactive
compound-related
up
94%
yield
99%
ee
(R)
or
99:1
cis/trans.
Structure-based
computational
results
provided
molecular
insights
into
source
Our
work
demonstrates
concise
engineering
workflow
collective
evolution
enzymes
panels
has
promising
prospects
engineering.
Chemistry - A European Journal,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 6, 2024
Abstract
The
development
of
sustainable
chemistry
underlying
the
quest
to
minimize
and/or
valorize
waste
in
carbon‐neutral
manufacture
chemicals
is
followed
over
last
four
five
decades.
Both
chemo‐
and
biocatalysis
have
played
an
indispensable
role
this
odyssey.
particular
developments
protein
engineering,
metagenomics
bioinformatics
preceding
three
decades
a
crucial
supporting
facilitating
widespread
application
both
whole
cell
cell‐free
biocatalysis.
pressing
need,
driven
by
climate
change
mitigation,
for
drastic
reduction
greenhouse
gas
(GHG)
emissions,
has
precipitated
energy
transition
based
on
decarbonization
defossilization
organic
production.
latter
involves
biomass
CO
2
as
feedstock
green
electricity
generated
using
solar,
wind,
hydroelectric
or
nuclear
energy.
use
polysaccharides
feedstocks
will
underpin
renaissance
carbohydrate
with
pentoses
hexoses
base
bio‐based
solvents
polymers
environmentally
friendly
downstream
products.
availability
inexpensive
solar
led
increasing
attention
electro(bio)catalysis
photo(bio)catalysis
which
turn
leading
myriad
innovations
these
fields.
ACS Catalysis,
Год журнала:
2025,
Номер
15(3), С. 1522 - 1531
Опубликована: Янв. 11, 2025
Axially
chiral
biaryl
benzylamines
are
present
in
numerous
natural
products,
pharmaceuticals,
ligands,
and
catalysts.
However,
the
direct
catalytic
synthesis
of
these
functional
molecules
using
a
robust
strategy
remains
formidable
challenge.
Reductive
amination
desymmetrization
dialdehydes
offers
powerful
approach
for
construction
axially
but
suffers
from
extensive
undesirable
side
reactions.
Herein,
we
engineered
ancestral
imine
reductases
to
enable
reductive
dialdehydes,
allowing
wide
range
with
up
99%
conversion
enantiomeric
excess
(ee).
The
ratio
product
byproducts
was
97:3
over
90:10
most
cases.
This
work
presents
an
alternative
accessing
will
stimulate
development
associated
bioactive
catalysts/ligands.