ACS Omega,
Год журнала:
2024,
Номер
9(13), С. 15697 - 15708
Опубликована: Март 21, 2024
The
bipodal
compounds
[(TMG2biphenN-R)CuI–NCMe](PF6)
(R
=
Me,
Ar
(4-CF3Ph-))
and
[(TMG2biphenN-Me)CuI–I]
have
been
synthesized
with
ligands
that
feature
a
diarylmethyl-
triaryl-amine
framework
superbasic
tetramethylguanidinyl
residues
(TMG).
cationic
Cu(I)
sites
mediate
catalytic
nitrene-transfer
reactions
between
the
imidoiodinane
PhI
NTs
(Ts
tosyl)
panel
of
styrenes
in
MeCN,
to
afford
aziridines,
demonstrating
comparable
reactivity
profiles.
copper
reagents
further
explored
execute
C–H
amination
variety
aliphatic
aromatic
hydrocarbons
two
distinct
nitrene
sources
NTces
(Tces
2,2,2-trichloroethylsulfamate)
benzene/HFIP
(10:2
v/v).
Good
yields
obtained
for
sec-benzylic
tert-C–H
bonds
various
substrates,
especially
more
electron-deficient
catalyst
[(TMG2biphenN–Ar)CuI–NCMe](PF6).
In
conjunction
earlier
studies,
order
these
as
function
metal
employed
is
established
Cu
>
Fe
Co
≥
Mn.
However,
opposed
base-metal
analogues,
are
less
reactive
than
similar
tripodal
catalyst.
observed
fluorophilicity
may
provide
deactivation
pathway.
Crystals,
Год журнала:
2023,
Номер
13(4), С. 550 - 550
Опубликована: Март 23, 2023
This
manuscript
reviews
the
current
trends
in
recovery
of
Platinum
Group
Metals
(PGMs)
from
end-of-life
autocatalysts
and
aims
recently
funded
Marie
Sklodowska-Curie
Project
“Chemistry
Metals-CHemPGM”
towards
greening
PGMs
processes
reusing
recovered
for
preparation
new
catalysts.
Together
with
analysis
state
art
spent
through
pyrometallurgical
hydrometallurgical
routes
recent
reducing
their
environmental
impact,
also
emerging
sustainable
green
technologies
are
analyzed.
Particular
focus
is
given
on
mechanochemical
processing
as
a
promising
route
not
only
pretreatment
waste
materials
but
direct
leaching.
The
present
review
identifies
catalysts
carbon
neutrality
few
efforts
developing
PGM-based
starting
directly
liquor
leach
solutions
envisaging
therefore
possible
key
to
close
loop
more
efficient
way.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(4), С. 1549 - 1558
Опубликована: Янв. 1, 2024
Chemical
environment
and
precursor-coordinating
molecular
interactions
within
a
perovskite
precursor
solution
can
lead
to
important
implications
in
structural
defects
crystallization
kinetics
of
film.
Thus,
the
opto-electronic
quality
such
films
be
boosted
by
carefully
fine-tuning
coordination
chemistry
precursors
Chemistry - A European Journal,
Год журнала:
2020,
Номер
27(13), С. 4216 - 4229
Опубликована: Авг. 26, 2020
Abstract
Organic
superbases
are
a
distinct
and
increasingly
utilized
class
of
Brønsted
base
that
possess
properties
complementary
to
common
inorganic
bases.
This
Concept
article
discusses
recent
applications
commercial
organic
in
modern
synthetic
methodologies.
Examples
the
advantages
three
areas
highlighted,
including
discovery
new
base‐catalyzed
reactions,
optimization
reactions
require
stoichiometric
base,
high‐throughput
experimentation
technology.
Journal of the American Chemical Society,
Год журнала:
2022,
Номер
144(26), С. 11459 - 11481
Опубликована: Июнь 22, 2022
Hydroaminoalkylation
is
a
powerful,
atom-economic
catalytic
reaction
for
the
of
amines
with
alkenes
and
alkynes.
This
C–H
functionalization
allows
alkylation
using
simple
or
alkynes
as
alkylating
agents.
transformation
has
significant
potential
transformative
approaches
in
pharmaceutical,
agrochemical,
fine
chemical
industries
preparation
selectively
substituted
N-heterocycles
shows
promise
materials
science
synthesis
functional
responsive
aminated
materials.
Different
early
transition-metal,
late
photoredox
catalysts
mediate
hydroaminoalkylation
by
distinct
mechanistic
pathways.
These
insights
have
resulted
development
new
conditions
to
realize
broad
range
substrates:
activated
unactivated,
terminal
internal,
C–C
double
triple
bonds
aryl
alkyl
primary,
secondary,
tertiary
amines,
including
N-heterocyclic
amines.
By
deploying
select
specific
substrate
combinations,
control
over
regioselectivity,
diastereoselectivity,
enantioselectivity
been
realized.
Key
barriers
widespread
adoption
this
include
air
moisture
sensitivity
transition-metal
well
heavy
dependence
on
amine
protecting
directing
groups
photocatalytic
routes.
Advances
improved
catalyst
robustness,
scope,
regio-/stereoselective
reactions
early-
catalysts,
catalysis,
are
highlighted,
opportunities
further
included.
perspective
that
be
disruptive
strategy
from
alkenes.
Organic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(10), С. 2897 - 2904
Опубликована: Янв. 1, 2024
Cyclization
and
1,4-conjugate
addition/cyclization
between
2-activated
1,3-enynes
azlactones
were
achieved
with
chiral
guanidine-amides
for
enol-type
activation
to
yield
a
range
of
δ-lactone
derivatives.
Inorganic Chemistry,
Год журнала:
2020,
Номер
59(7), С. 4693 - 4702
Опубликована: Март 11, 2020
Tetra-aryl-substituted
symmetrical
conjugated
bis-guanidine
(CBG)
ligands
such
as
L1-3
(3H)
[L(3H)
=
{(ArHN)(ArHN)C═N-C═NAr(NHAr)};
Ar
2,6-Me2-C6H3
(L1(3H)),
2,6-Et2-C6H3
(L2(3H)),
and
2,6-iPr2-C6H3
(L3(3H))]
have
been
employed
to
synthesize
a
series
of
four-
six-membered
aluminum
heterocycles
(1-8)
for
the
first
time.
Generally,
complexes
bearing
N,N'-
chelated
guanidinate
β-diketiminate/dipyrromethene
ligand
systems
form
heterocycles,
respectively.
However,
has
capability
forming
both
possessing
multimetal
centers
within
same
molecule;
this
is
due
presence
three
acidic
protons,
which
can
be
easily
deprotonated
(at
least
two
protons)
upon
treatment
with
metal
reagents.
Both
mono-
dinuclear
alkyls
mononuclear
alkoxide,
halide,
hydride
structurally
characterized.
Further,
we
demonstrated
potential
mononuclear,
CBG
dialkyls
in
catalytic
hydroboration
broad
range
aldehydes
ketones
pinacolborane
(HBpin).
Natural Product Reports,
Год журнала:
2020,
Номер
38(3), С. 586 - 667
Опубликована: Окт. 6, 2020
Covering:
2017-2019Guanidine
natural
products
isolated
from
microorganisms,
marine
invertebrates
and
terrestrial
plants,
amphibians
spiders,
represented
by
non-ribosomal
peptides,
guanidine-bearing
polyketides,
alkaloids,
terpenoids
shikimic
acid
derived,
are
the
subject
of
this
review.
The
topics
include
discovery
new
metabolites,
total
synthesis
guanidine
compounds,
biological
activity
mechanism-of-action,
biosynthesis
ecological
functions.
Chemical Science,
Год журнала:
2022,
Номер
13(14), С. 4103 - 4108
Опубликована: Янв. 1, 2022
An
asymmetric
[1,2]
Stevens
rearrangement
was
realized
via
chiral
guanidine
and
copper(
i
)
complexes.
A
series
of
novel
dithioketal
derivatives
were
obtained
with
good
yields
(up
to
90%
yield)
enantioselectivities
96
:
4
er).
Microorganisms,
Год журнала:
2023,
Номер
11(9), С. 2194 - 2194
Опубликована: Авг. 30, 2023
A
microbiologically
influenced
corrosion
(MIC)
causes
huge
economic
losses
and
serious
environmental
damage
every
year.
The
prevention
control
measures
for
MIC
mainly
include
physical,
chemical,
biological
methods.
Among
them,
biocide
application
is
the
most
cost-effective
method.
Although
various
biocides
have
their
own
advantages
in
preventing
treating
MIC,
problem
of
polluting
environment
increasing
microorganism
resistance.
Therefore,
it
has
stimulated
exploration
continuously
developing
new
environmentally
friendly
efficient
biocides.
In
this
review,
research
progress
used
to
prevent
are
discussed.
Also,
review
provides
a
resource
rational
use
regarding
mitigation
prevention.
