Microplastic
pollutants
in
lakes
can
introduce
a
series
of
ecological
and
environmental
problems,
mapping
the
sources
microplastics
is
key
to
solving
lake
microplastic
pollution.
In
this
study,
atmospheric
samples
collected
from
6
sampling
sites
Wuliangsuhai
Lake
March
June
2021
were
analyzed,
deposition
fluxes
measured,
simulated
using
HYSPLIT
model.
The
results
showed
that
average
flux
was
(3371
±
1423)
n/d·m2
;
at
order
ML-3
>
ML-5
ML-6
ML-2
ML-4
ML-1;
shapes
included
fibrous,
fragmented,
lumpy,
blocks;
colors
transparent,
black,
blue,
red,
green,
yellow;
species
polypropylene,
polyethylene,
rayon,
polyethylene
terephthalate,
polystyrene,
natural
fibers.
According
basic
characteristics
backward
trajectories,
primarily
attributable
transportation
external
large
cities,
with
small
portion
surrounding
local
environment.
study
provide
theoretical
basis
for
other
inland
as
well
prevention
control
pollution,
which
great
significance
traceability
pollutants.
Organic Letters,
Journal Year:
2024,
Volume and Issue:
26(16), P. 3332 - 3337
Published: April 15, 2024
As
a
class
of
rising
electrophilic
coupling
reagents,
aryl–thianthreniums
(aryl-TTs)
have
been
gaining
immense
attention.
Herein,
novel
palladium-catalyzed
domino
annulation
aryl-TTs
with
anhydrides
is
proposed
to
rapidly
assemble
collection
highly
functionalized
fluorenones.
This
finding
presents
an
innovative
reaction
pattern
wherein
the
version
first
involved.
Heavily
compared
existing
conversions
aryl-TTs,
this
identified
process
successively
functions
as
four
aryl
C–H
bonds.
Organic Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Enantioselective
synthesis
of
isoxazolines
bearing
allenes
by
palladium
catalyzed
carboetherification
alkenyl
oximes
with
propargylic
acetates.
DFT
calculations
carried
out
to
disclose
the
detailed
mechanism
and
origins
enantioselectivity.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(34), P. 12808 - 12818
Published: Aug. 15, 2024
Herein,
a
mechanochemically
triggered
C–H
arylation
of
coumarins,
quinoline-N-oxides,
and
uracil
molecules
with
aryl
thianthrenium
salts
is
described.
Aryl
are
primarily
acknowledged
for
their
expedient
reusability
adherence
to
atom
economy
principles.
Mechanistic
studies
suggested
that
mechanical
stress
promoted
the
homolytic
scission
C–S
bond
salts,
forming
radical
intermediate.
Later,
intermediate
engaged
in
addition
reaction
above
heterocycles,
leading
desired
products
good
yields.
This
versatile
protocol
accommodates
wide
range
functional
groups
facilitates
synthesis
bioactive
compounds
drug
molecules.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
12(2)
Published: Nov. 21, 2024
Abstract
Efficiently
assembling
amino
acids
and
peptides
with
bioactive
molecules
facilitates
the
modular
streamlined
synthesis
of
a
diverse
library
peptide‐related
compounds.
Particularly
notable
is
their
application
in
pharmaceutical
development,
leveraging
site‐selective
late‐stage
functionalization.
Here,
visible
light‐induced
three‐component
reaction
involving
arylthianthrenium
salts,
acid/peptide
derivatives,
alkenes
are
introduced.
This
approach
utilizes
captodatively‐stabilized
carbon
radicals
to
enable
radical‐radical
C─C
coupling,
effectively
constructing
complex
molecules.
method
offers
promising
alternative
route
for
peptide‐derived
bio‐relevant
compounds
Encyclopedia of Reagents for Organic Synthesis,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 6
Published: April 18, 2024
image
A
[
195072‐48‐1
]
C
19
H
13
F
3
O
S
(MW
442.48)
InChI
=
1S/C18H13S2.CHF3O3S/c1‐2‐8‐14(9‐3‐1)20‐17‐12‐6‐4‐10‐15(17)19‐16‐11‐5‐7‐13‐18(16)20;2‐1(3,4)8(5,6)7/h1‐13H;(H,5,6,7)/q+1;/p‐1
InChiKey
ILICKJZOLUIMMN‐UHFFFAOYSA‐M
B
2839478‐51‐0
20
14
ClF
4
506.95)
1S/C19H14ClOS2.CHF3O3S/c1‐21‐15‐11‐10‐13(12‐14(15)20)23‐18‐8‐4‐2‐6‐16(18)22‐17‐7‐3‐5‐9‐19(17)23;2‐1(3,4)8(5,6)7/h2‐12H,1H3;(H,5,6,7)/q+1;/p‐1
UHXRBIHFIKXURP‐UHFFFAOYSA‐M
2786722‐96‐9
12
6
510.48)
1S/C19H12F3S2.CHF3O3S/c20‐19(21,22)13‐9‐11‐14(12‐10‐13)24‐17‐7‐3‐1‐5‐15(17)23‐16‐6‐2‐4‐8‐18(16)24;2‐1(3,4)8(5,6)7/h1‐12H;(H,5,6,7)/q+1;/p‐1
UEAVFAKSNUECER‐UHFFFAOYSA‐M
D
2786723‐55‐3
18
NO
443.47)
1S/C17H12NS2.CHF3O3S/c1‐3‐7‐16‐14(5‐1)19‐15‐6‐2‐4‐8‐17(15)20(16)13‐9‐11‐18‐12‐10‐13;2‐1(3,4)8(5,6)7/h1‐12H;(H,5,6,7)/q+1;/p‐1
SRMXRMTYQFMLCQ‐UHFFFAOYSA‐M
(reagents
used
as
an
aryl
pseudohalide
in
transition‐metal
catalyzed,
transition
metal‐free,
and
photochemical
reactions)
Physical
Data
:
mp
202.8–204.7
°C.
1
159.2–162.7
2
(Not
reported).
A–D
Solubility
soluble
acetonitrile
dichloromethane.
–
Form
Supplied
not
commercially
available;
free‐flowing
solids
prepared
by
literature
procedures.
3–5
Analysis
of
Reagent
Purity
NMR.
Purification
trituration
from
dichloromethane
using
diethyl
ether
or
hexanes;
silica
gel
chromatography
(eluting
with
DCM:MeOH).
Handling,
Storage,
Precautions
stable
under
ambient
conditions
for
extended
periods
time.
Can
be
weighed
normal
atmosphere
stored
a
vial
air.
Preparative
Methods
(From
simple
arenes)
Treatment
thianthrene
‐oxide
(TTSO)
trifluoroacetic
anhydride
(TFAA)
triflic
acid
(TfOH)
the
presence
desired
arene
at
0
After
addition
all
reagents,
reactions
are
typically
allowed
to
stir
between
h
depending
on
substrate.
Alternatively,
treatment
TTSO
(Tf
O)
−40
3,5
completion,
purple
reaction
is
quenched
methanol
generate
colorless/yellow
solution.
The
crude
mixture
concentrated
reduced
pressure
residue
triturated
afford
solid
which
isolated
filtration.
arylboronic
acids)
thianthrene,
copper(II)
triflate
water
nitrogen
100
°C
h.
aqueous
workup,
Organic Letters,
Journal Year:
2023,
Volume and Issue:
25(21), P. 3898 - 3903
Published: May 23, 2023
An
efficient
copper-catalyzed
inter/intramolecular
oxy/aminoarylation
of
γ-hydroxy/aminoalkenes
with
diaryliodonium
triflates
is
reported.
Simple
activation
these
arylating
agents
copper(II)
triflate
in
dichloromethane
triggers
a
smooth
the
alkene,
which
simultaneously
trapped
by
internal
nucleophile,
yielding,
depending
upon
its
nature,
range
highly
substituted
tetrahydrofurans
and
pyrrolidines.
The
cyclization
was
moreover
found
to
be
stereospecific,
diastereoisomeric
alkenes
yielding
diastereoisomers
cyclized
product,
could
extended
oxyalkynylation.
Microplastic
pollutants
in
lakes
can
introduce
a
series
of
ecological
and
environmental
problems,
mapping
the
sources
microplastics
is
key
to
solving
lake
microplastic
pollution.
In
this
study,
atmospheric
samples
collected
from
6
sampling
sites
Wuliangsuhai
Lake
March
June
2021
were
analyzed,
deposition
fluxes
measured,
simulated
using
HYSPLIT
model.
The
results
showed
that
average
flux
was
(3371
±
1423)
n/d·m2
;
at
order
ML-3
>
ML-5
ML-6
ML-2
ML-4
ML-1;
shapes
included
fibrous,
fragmented,
lumpy,
blocks;
colors
transparent,
black,
blue,
red,
green,
yellow;
species
polypropylene,
polyethylene,
rayon,
polyethylene
terephthalate,
polystyrene,
natural
fibers.
According
basic
characteristics
backward
trajectories,
primarily
attributable
transportation
external
large
cities,
with
small
portion
surrounding
local
environment.
study
provide
theoretical
basis
for
other
inland
as
well
prevention
control
pollution,
which
great
significance
traceability
pollutants.
