1,3,4-Oxadiazole Sulfonamide Derivatives Containing Pyrazole Structures: Design, Synthesis, Biological Activity Studies, and Mechanism Study
Xiaoli Ren,
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Youhua Liu,
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Fa‐li Wang
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et al.
Journal of Agricultural and Food Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 29, 2025
Sulfonamide
derivatives
have
been
widely
used
for
pesticide
research
in
recent
years.
Herein,
1,3,4-oxadiazole
sulfonamide
containing
a
pyrazole
structure
were
synthesized,
and
their
structure-activity
relationship
was
studied.
Bioactivity
tests
showed
the
remarkable
efficacy
of
most
synthesized
compounds.
Especially
Xanthomonas
oryzae
pv
oryzae,
A23
exhibited
100%
inhibition
at
100
mg/L,
surpassing
bismerthiazol
(99.3%),
90%
50
outperforming
thiodiazole
copper
(84.5%),
with
an
EC50
5.0
markedly
more
active
than
(23.9
mg/L)
(63.5
mg/L).
Initial
investigations
into
antimicrobial
mechanisms
involved
series
biochemical
analyses,
including
bacterial
growth
rate
analysis,
scanning
electron
microscopy,
biofilm
formation
experiments,
molecular
docking
analyses.
Notably,
considerably
inhibited
Xoo
biofilms,
disrupting
integrity
cell
membranes.
Co-analysis
transcriptomics
proteomics
revealed
capability
to
regulate
pathways
such
as
tryptophan
metabolism
phenylpropanoid
biosynthesis,
enhancing
innate
immunity
rice
activating
its
disease
resistance.
Thus,
emerges
potential
immunoinducible
lead
compound
discovery
highly
immune-inducing
agents.
Language: Английский
Copper-Catalyzed Regioselective 1,4-Sulfonyl Indolylation of 1,3-Dienes with Sulfonyl Chloride and Indoles
Organic Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 22, 2025
A
copper-based
catalytic
system
has
been
described
to
enable
the
efficient
1,4-sulfonylindolylation
of
1,3-dienes
with
sulfonyl
chloride
and
indoles.
This
protocol
offers
a
practical
method
for
synthesis
allylsulfone-containing
indole
derivatives
broad
range
compatible
functionalities
excellent
chemo-
regioselectivities.
Mechanistic
studies
suggest
that
copper
catalyst
plays
dual
role
initiating
radicals
prompting
coupling
in
this
conjugated
diene-selective
1,4-difunctionalization
strategy.
Language: Английский
Cobalt(III) Complexes of Pyridine-Functionalized Chelating NHC Ligands: Effective Catalysts for the Olefination of Alcohols Using Sulfones
Misba Siddique,
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Mehali Das,
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Arnab Rit
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et al.
Organometallics,
Journal Year:
2024,
Volume and Issue:
43(13), P. 1482 - 1489
Published: June 26, 2024
Several
air-stable
cobalt(III)
complexes
1a-d
featuring
pyridine-functionalized
NHC
ligand
systems
were
synthesized
and
completely
characterized.
These
then
explored
as
phosphine-free
catalysts
for
the
olefination
of
alcohols
with
sulfones,
among
studied
here,
benzimidazolylidene-supported
1b
complex
acetylacetonate
(acac)
a
labile
co-ligand
was
noted
to
be
most
active
one,
which
also
successful
broad
range
sulfones
providing
diverse
olefins.
It
is
important
mention
that
this
first
example
such
protocol
catalyzed
by
cobalt.
Furthermore,
utility
present
demonstrated
gram-scale
reaction
postsynthetic
modifications
obtained
compounds.
Finally,
based
on
various
control
experiments
including
detection
intermediates
kinetic
studies,
plausible
mechanism
proposed.
Language: Английский
Smart β-cyclodextrin-dominated helical supramolecular dendritic assemblies improve the foliar affinity and biofilm disruption for treating alarming bacterial diseases
Xiaoxue Tian,
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Hongsheng Hu,
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Lijun Fan
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et al.
Carbohydrate Polymers,
Journal Year:
2024,
Volume and Issue:
348, P. 122823 - 122823
Published: Oct. 9, 2024
Language: Английский
Pd-, Cu-, and Ni-Catalyzed Reactions: A Comprehensive Review of the Efficient Approaches towards the Synthesis of Antibacterial Molecules
Almeera Zia,
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Shehla Khalid,
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Nasır Rasool
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et al.
Pharmaceuticals,
Journal Year:
2024,
Volume and Issue:
17(10), P. 1370 - 1370
Published: Oct. 15, 2024
A
strong
synthetic
tool
for
many
naturally
occurring
chemicals,
polymers,
and
pharmaceutical
substances
is
transition
metal-catalyzed
synthesis.
serious
concern
to
human
health
the
emergence
of
bacterial
resistance
a
broad
spectrum
antibacterial
medications.
The
synthesis
chemical
molecules
that
are
potential
candidates
underway.
main
contributions
medicine
found
be
effective
in
metal
catalysis
heterocyclic
chemistry.
This
review
underlines
use
heterocycles
certain
metals
(Pd,
Cu,
Ni)
as
catalysts
methods
compounds.
Pharmaceutical
chemists
might
opt
clinical
exploration
these
techniques
due
their
potential.
Language: Английский