Highly effective, rapid and convenient one-pot synthesis of O,O’ -dialkyl- N,N -dialkylphosphoramidates from trialkyl phosphites
Sweeti,
Pauline Malik,
Gyanesh Mishra
и другие.
Synthetic Communications,
Год журнала:
2025,
Номер
unknown, С. 1 - 11
Опубликована: Апрель 23, 2025
Язык: Английский
Increasing circular and bio-based content of a thermosetting polyurethane for encapsulation of optoelectronic devices: A multivariate investigation
Journal of Cleaner Production,
Год журнала:
2023,
Номер
408, С. 137161 - 137161
Опубликована: Апрель 11, 2023
Transparent
thermosetting
polyurethanes
(PU)
with
increased
circular
and
bio-based
content
have
been
developed
an
effective
efficient
approach
based
on
the
Design
of
Experiment.
Starting
from
a
commercial
PU
formulation
for
light-emitting
diode
encapsulation,
fossil-based
polyol
blend
has
partially
replaced
potentially
recycled
bis(2-hydroxyethyl)
terephthalate
(BHET)
diol
polyol.
BHET
directly
implemented
in
without
requiring
any
additional
solvent
or
treatment.
The
multivariate
allowed
to
study
formulative
(i.e.
BHET,
polyols)
process
factors
mixing
time
temperature
blend)
polymer
preparation
by
using
optical
spectroscopy,
differential
scanning
calorimetry,
thermogravimetric
analysis.
effect
each
factor
thermal
properties
resulting
polyurethane
films
observed
clearly
quantified.
Particularly,
implementation
improved
stability
but
reduced
film
transmittance
as
concentration
increases.
Circular
components
into
up
80%w/w
optimized
following
property-driven
Polyurethane
formulated
selected
showed
transparency,
behaviour,
long-term
stability,
cost
comparable
starting
formulation.
Market-level
ease
highlight
that
PUs
can
be
rapidly
within
current
production
processes,
promoting
shift
towards
Economy
solid
industrial
symbiosis.
At
last,
present
easily
repurposed
further
improve
sustainability
polyurethanes,
well
develop
other
classes
polymers.
Язык: Английский
Tf2O-Mediated P(O)–N Bond Formation of Either P(O)–OH or P(O)–H Reagents with Multitype Amines
The Journal of Organic Chemistry,
Год журнала:
2024,
Номер
89(10), С. 6729 - 6739
Опубликована: Май 1, 2024
We
have
developed
a
Tf2O-mediated
approach
for
the
direct
amination
of
either
P(O)–OH
or
P(O)–H
reagents
with
variety
aliphatic
aromatic
amines.
Without
requirement
precious
metals
and
toxic
reagents,
this
protocol
provides
an
alternative
route
to
various
phosphinamides
phosphoramides.
The
reaction
proceeds
under
simple
mild
conditions
can
be
effectively
scaled
up
similar
efficiency.
Язык: Английский
Synthesis of 9,10‐Bis(organochalcogenyl)phenanthrenes by Cyclization of (Biphenyl‐2‐alkyne)chalcogenides
Asian Journal of Organic Chemistry,
Год журнала:
2024,
Номер
13(5)
Опубликована: Фев. 26, 2024
Abstract
A
regioselective,
operationally
simple
and
scalable
protocol
was
developed
for
the
synthesis
of
9,10‐bis(organochalcogenyl)phenanthrenes
seleno‐spiro[cyclohexane‐1,1′‐indene]‐2,5‐dien‐4‐ones
through
cyclization
(biphenyl‐2‐alkyne)chalcogenides.
The
reaction
occurs
in
presence
diorganyl
diselenides,
Oxone®
as
a
green
oxidizing
agent,
acetonitrile
at
80
°C.
In
this
study,
20
compounds
were
obtained
yields
up
to
97
%
short
times
(1–4
h).
Язык: Английский
Synthesis of Phosphate Esters by Using Diphenyl Ditelluride as Organocatalyst
European Journal of Organic Chemistry,
Год журнала:
2023,
Номер
26(14)
Опубликована: Март 16, 2023
Abstract
We
report
a
protocol
for
the
synthesis
of
new
dialkyl(1‐(organolthio)naphthalen‐2‐yl)phosphates
and
derivatives
via
dehydrogenative
phosphorylation
reaction
between
functionalized
naphthols
H
‐phosphonates.
Diphenyl
ditelluride
was
employed
as
an
organocatalyst
sonochemistry
alternative
energy
source.
The
conditions
were
defined
through
factorial
design
approach,
best
condition
provided
in
yields
that
varied
from
51–98
%
under
ultrasound
irradiation
after
2
h
sonication.
synthetic
also
effective
phenol
thiophenol
starting
materials.
All
products
characterized
by
state‐of‐the‐art
spectroscopic
spectrometric
techniques.
Язык: Английский
31P Nuclear Magnetic Resonance Spectroscopy for Monitoring Organic Reactions and Organic Compounds
The Chemical Record,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Abstract
31
P
NMR
spectroscopy
is
a
consolidated
tool
for
the
characterization
of
organophosphorus
compounds
and,
more
recently,
reaction
monitoring.
The
evolution
organic
synthesis,
mainly
due
to
combination
elaborated
building
blocks
with
enabling
technologies,
generated
great
challenges
understand
and
optimize
synthetic
methodologies.
In
this
sense,
experiments
also
became
routine
technique
monitoring,
accessing
products
side
yields,
chiral
recognition,
kinetic
data,
intermediates,
as
well
basic
parameters,
such
acid‐base
hydrogen‐bonding.
This
review
deals
these
aspects
demonstrating
essential
role
spectroscopy.
recent
publications
(the
last
ten
years)
will
be
explored,
discussing
strategies
accomplished
detect
and/or
quantify
distinct
molecules,
approaching
mechanism,
stability,
stereochemistry,
utility
probe.
Язык: Английский