Abstract
The
use
of
bioresource‐derived
wastes
to
valuable
organic
reactions
is
a
new
and
fascinating
trend
in
the
current‐day
chemistry
which
aims
at
decrease/elimination
depleting
resources
based
chemicals.
This
article
discusses
sustainable
protocol
for
synthesis
C=C
bonds
via
Knoevenagel
condensation
reaction
α‐cyano
esters
with
aldehydes
using
water
extract
Annona
squamosa
fruit
shell
ash
(WEASF)
as
catalyst.
These
have
been
conducted
room
temperature
(RT)
aqueous
media
products
are
purified
by
recrystallization.
WEASF
acts
biorenewable
base
process
avoids
solvents
column‐based
purifications
products.
bio‐derived
also
showed
its
high
reusability
current
alternative
existing
methods
making
polysubstituted
olefins.
Green Chemistry,
Год журнала:
2023,
Номер
25(16), С. 6120 - 6148
Опубликована: Янв. 1, 2023
This
article
presents
a
review
of
the
reports
on
catalyst-free
mechanochemical
organic
transformations
and
ability
to
initiate
reactions
that
are
extremely
difficult/impossible
occur
is
notable
advancement
process.
Green Chemistry,
Год журнала:
2022,
Номер
24(16), С. 6215 - 6223
Опубликована: Янв. 1, 2022
WEPA,
a
waste
biomass-derived
catalyst,
was
used
to
synthesize
quinoxalines
from
aryl/heteroaryl
1,2-diamines
and
α-hydroxy
ketones
via
metal
catalyst/added
oxidant-free
sequential
condensation–cyclization–oxidation
process.
Green Chemistry Letters and Reviews,
Год журнала:
2021,
Номер
14(4), С. 700 - 712
Опубликована: Окт. 2, 2021
Utilization
of
waste-derived
materials
for
industrially
pertinent
chemical
transformations
is
highly
challenging
and
offers
sustainable
solution
to
waste
management.
Despite
several
difficulties
in
the
manufacture
aryl
iodides
(AIs),
which
are
fundamental
substrates
organic
synthesis,
we
report
here,
an
added
oxidant/metal/catalyst/additive
problematic
solvent-free
versatile
straightforward
protocol
synthesis
AIs
using
molecular
iodine
(I2)
water
extract
pomegranate
ash
(WEPA).
These
were
performed
at
room
temperature
(rt)
reactions
takes
place
5–20
min
give
83–99%
yields
AIs.
WEPA
was
characterized
by
XPS,
EDX,
XRF,
XRD,
FTIR
analysis
a
plausible
mechanism
has
been
established
based
on
these
analyses
along
with
some
control
experiments.
Further,
products
purified
recrystallization
technique.
This
work
intrinsic
sustainability,
high
substrate
feasibility,
utilization
biorenewable
catalystytic
media,
ease
execution
separation
products,
oxidant/catalyst/metal
additive-free
conditions
may
become
one
among
forefront
procedures
making
The
use
as
media
this
iodination
novelty
method
be
used
further
in-process
(e.g.
cross-couplings,
nucleophilic
reactions,
etc.)
access
fine
chemicals.
Green Chemistry Letters and Reviews,
Год журнала:
2022,
Номер
15(3), С. 529 - 536
Опубликована: Июль 3, 2022
The
application
of
waste
biomass-derived
materials
to
synthetic
chemistry
is
a
remarkable
achievement,
and
the
use
aqueous
media
further
advancement.
switch
towards
earth's
abundant
metals
like
cobalt/copper/iron/nickel
from
precious
palladium
in
C–C
coupling
reactions
also
high
throughput
global
sustainability
perspective.
Herein,
we
describe
CuCl-catalyzed
homocoupling
(hetero)arylboronic
acids
(HABAs)
water
extract
pomegranate
ash
(WEPA)
with
low
E-factor
1.25
without
including
column
chromatographic
separation
products,
which
helped
understanding
effectiveness
this
method
on
comparison
reported
protocols
lacking
amounts
silica
gel
eluents,
however,
it
was
171.64
by
purification.
are
conducted
at
room
temperature
deliver
self-coupling
products
90–99%
yields
10–45
min
under
metal,
ligand,
non-renewable
base,
toxic/problematic
organic
solvent
added
oxidant-free
conditions.
A
wide
range
substrates
were
screened
aryl
heteroaryl
moieties
containing
diversified
functional
groups.
substitution
rare
metals-based
catalysts
copper,
exploration
state-of-the-art
coupling,
biorenewable
media,
ambient
conditions,
operational
simplicity,
excellent
biaryls
quick
noteworthy
advantages
protocol.
