Fluorophore branching boosted photo-induced energy transfer in UiO-66 for ultrasensitive and instant hydrazine sensing
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(20), С. 12088 - 12097
Опубликована: Янв. 1, 2024
Metal
organic
frameworks
(MOFs)
have
made
great
progress
in
the
field
of
fluorescent
sensing;
however,
whether
electronic
structure
and
recognized
sites
can
be
adjusted
by
external
functionalization
still
remains
challenging.
Язык: Английский
Pyridine-catalyzed ring-opening reaction of cyclopropenone with bromomethyl carbonyl compounds toward furan-2(5H)-ones
Chemical Communications,
Год журнала:
2024,
Номер
60(14), С. 1900 - 1903
Опубликована: Янв. 1, 2024
We
developed
a
pyridine-catalyzed
annulation
of
diaryl
cyclopropenone
with
bromomethyl
carbonyl
compounds
leading
to
5-carbonyl
furan-2(5
H
)-ones.
Язык: Английский
Phosphine-Catalyzed Ring-Opening Regioselective Addition of Cyclopropenones with Amides
The Journal of Organic Chemistry,
Год журнала:
2024,
Номер
89(14), С. 10093 - 10098
Опубликована: Июнь 27, 2024
A
series
of
amides,
including
α-bromo
hydroxamates,
Язык: Английский
Transition from Kwon [4+2]- to [3+2]-cycloaddition enabled by AgF-assisted phosphine catalysis
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 14, 2024
Phosphine
catalysis
generally
relies
on
the
potential
of
carbanion-phosphonium
zwitterions
that
are
generated
via
nucleophilic
addition
phosphine
catalyst
to
electrophilic
reactants.
Consequently,
structural
modification
using
distinct
reactants
has
emerged
as
a
prominent
strategy
enhance
diversity.
Herein,
we
present
an
alternative
utilizes
AgF
additive
expand
catalysis.
We
find
can
readily
transform
canonical
carbanion–phosphonium
zwitterion
into
silver
enolate–fluorophosphorane
intermediate,
eventually
furnishing
P(III)/P(V)
catalytic
cycle.
This
been
successfully
applied
phosphine-catalyzed
reaction
2-substituted
allenoate
and
imine,
resulting
in
transition
from
Kwon
[4
+
2]
cycloaddition
[3
cycloaddition.
features
remarkable
diastereoselectivity,
high
yield,
broad
substrate
scope.
Experimental
computational
studies
have
validated
proposed
mechanism.
Given
prevalence
catalysis,
this
AgF-assisted
is
believed
hold
significant
for
advancing
carbanion
phosphonium
Here,
authors
demonstrate
be
used
Язык: Английский
Expedient Access to Polysubstituted Acrylamides via Strain-Release-Driven Dual Phosphine and Palladium Catalysis
Chemical Communications,
Год журнала:
2024,
Номер
60(51), С. 6532 - 6535
Опубликована: Янв. 1, 2024
Polysubstituted
acrylamides
are
ubiquitous
in
bioactive
molecules
and
natural
products.
However,
synthetic
methods
for
the
assembly
of
these
important
motifs
remain
underdeveloped.
Herein,
we
report
expedient
synthesis
structurally
diverse
synthetically
challenging
polysubstituted
from
readily
available
aromatic
amines,
cyclopropenones
(CpOs),
aryl
halides
Язык: Английский
Decarboxylative Aminomethylation of Indole-3-carboxylic Acids via Strain Release-Driven Ring Opening of 1,2-Oxazetidines
Organic Letters,
Год журнала:
2024,
Номер
26(41), С. 8934 - 8938
Опубликована: Окт. 9, 2024
A
copper-catalyzed
decarboxylative
aminomethylation
of
indole-3-carboxylic
acids
with
1,2-oxazetidines
has
been
developed,
enabling
the
rapid
synthesis
structurally
diverse
3-aminomethylindoles
in
good
to
excellent
yields.
Remarkably,
an
unprecedented
aminomethylation/cyclization
cascade
was
further
achieved
by
a
combination
copper
and
iron
salts
construct
complex
γ-carbolines
high
efficiency.
It
is
worth
noting
that
one
obtained
products
proved
be
dual-emissive
luminogen,
exhibiting
both
aggregation-caused
quenching
aggregation-induced
emission.
Язык: Английский
Hydroxyl-Assisted and Co(III)-Catalyzed Redox-Neutral C–H Activation/Directing Group Migration of 2-Pyridones with Propargyl Alcohols: Synthesis of Tetrasubstituted Alkenes
The Journal of Organic Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 11, 2024
This
study
provides
a
practical
route
to
synthesize
tetrasubstituted
alkenes
that
involves
Co(III)-catalyzed
C-H
bond
activation
and
regioselective
insertion
of
the
alkyne,
followed
by
chelation
substrate
hydroxyl
Co
migration
pyridine
group.
Density
functional
theory
studies
revealed
origin
regioselectivity
elucidated
crucial
role
group
for
pyridine.
The
method
can
be
conducted
on
gram
scale,
is
compatible
with
wide
range
substrates,
has
high
tolerance.
To
demonstrate
its
significance,
was
used
late-stage
modification
Fasudil.
Furthermore,
synthetic
significance
demonstrated
various
derivatizations
products,
many
which
exhibit
intriguing
fluorescence
characteristics.
Язык: Английский