One-Pot Domino Catalysis to Construct Alkyl/Aryl Pyrroles Initiated by Pd-TMM Annulation of Unactivated Imines
Organic Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 9, 2025
Herein,
a
one-pot
domino
catalyzed
three-component
process
is
described,
which
initiated
by
palladium/zinc
cooperatively
cycloaddition
between
trimethylenemethane
(TMM)
and
unactivated
alkyl/aryl
imines,
followed
isomerization
Zn(OTf)2-catalyzed
DDQ
oxidation,
furnishing
valuable
substituted
pyrroles.
We
disclose
that
the
cooperative
catalysis
affords
dual-Zn(OTf)2-stabilized
azapalladacycle,
wherein
Pd–N
bond
polarized
Zn(OTf)2,
facilitating
unique
outer-sphere
allylic
amination.
Moreover,
subsequent
dehydrogenation
can
be
feasibly
promoted
zinc
catalysis.
Language: Английский
Analysis of heavy metal ions (Pb, Hg, Cr, Cd, As) capture & detection based on quinoline probe binding data
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: March 22, 2025
This
research
employs
the
density
functional
theory
method
to
study
coordination
and
capture
of
"five
toxic"
heavy
metal
ions
(Pb,
Hg,
Cr,
Cd,
arsenic)
by
quinoline—derivative
molecular
probes.
The
has
determined
microscopic
configurations,
structural
parameters,
natural
charge
distributions
coordinating
atoms
in
optimal
structures
complexes
formed
probes
each
ion.
Additionally,
bond
orders
all
have
been
calculated
analyzed.
Furthermore,
calculating
infrared
vibration
frequencies
structures,
stability
verified.
Moreover,
binding
energies,
frontier
orbital
energy
levels,
gap
values
ion
through
further
obtained,
changes
ultraviolet—visible
absorption
spectra
fluorescence
also
investigated
probe's
ability
detect
ions.
Language: Английский
Exploring the activation potential of heme for 2,4-dichlorophenol, 2,4,6-trichlorophenol, and pentachlorophenol
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Oct. 5, 2024
The
presence
of
chlorophenols
in
water
poses
a
significant
threat
to
human
health
and
the
environment.
In
response
this
issue,
study
was
undertaken
evaluate
catalytic
capabilities
chlorinated
Heme
towards
common
present
water,
such
as
2,4-dichlorophenol,
2,4,6-trichlorophenol,
pentachlorophenol.
employed
B3LYP
method,
sophisticated
computational
technique
within
density
functional
theory,
investigate
molecular
interactions
transformations
involved.
It
scrutinized
structural
parameters,
Wiberg
Bond
Indices,
which
offer
insights
into
strength
nature
chemical
bonds,
along
with
spectroscopic
data
including
infrared
vibrational
spectra,
ultraviolet-visible
absorption
fluorescence
spectra.
Furthermore,
research
analyzed
binding
energies
orbital
energy
levels
before
after
formation
complexes
between
targeted
chlorophenols.
findings
indicate
that
displays
notable
activation
characteristic
these
This
suggests
could
act
an
effective
catalyst
degradation
presenting
novel
approach
purification.
theoretical
derived
from
are
invaluable,
potentially
guiding
development
more
efficient
systems
for
treating
chlorophenol-contaminated
thereby
reducing
environmental
risks
associated
hazardous
compounds.
Language: Английский