Light Induced Cobalt(III) Carbene Radical Formation from Dime-thyl Malonate as Carbene Precursor
Published: April 3, 2024
Radical-type
carbene
transfer
catalysis
is
an
efficient
method
for
the
direct
functionalization
of
C–H
and
C=C
bonds.
However,
radical
complexes
are
currently
formed
via
high-energy
precursors,
such
as
diazo
compounds
or
iodonium
ylides.
Many
these
precursors
require
additional
synthetic
steps,
have
explosive
nature
generate
halogenated
waste.
Con-sequently,
utilization
limited
by
specific
to
access
inter-mediate.
In
this
study,
we
a
cobalt(III)
complex
from
dimethyl
malonate,
which
commercially
available
bench-stable.
EPR
NMR
spectroscopy
were
used
identify
intermediates
showed
that
upon
light
irradiation.
presence
styrene,
occurred,
forming
cyclopropane
product.
With
photochemical
method,
demonstrate
malonate
can
be
alternative
precursor
in
formation
complex.
Language: Английский
Light Induced Cobalt(III) Carbene Radical Formation from Dimethyl Malonate As Carbene Precursor
Organometallics,
Journal Year:
2024,
Volume and Issue:
43(11), P. 1299 - 1307
Published: May 24, 2024
Radical-type
carbene
transfer
catalysis
is
an
efficient
method
for
the
direct
functionalization
of
C–H
and
C═C
bonds.
However,
radical
complexes
are
currently
formed
via
high-energy
precursors,
such
as
diazo
compounds
or
iodonium
ylides.
Many
these
precursors
require
additional
synthetic
steps,
have
explosive
nature,
generate
halogenated
waste.
Consequently,
utilization
limited
by
specific
that
access
intermediate.
In
this
study,
we
a
cobalt(III)
complex
from
dimethyl
malonate,
which
commercially
available
bench-stable.
EPR
NMR
spectroscopy
were
used
to
identify
intermediates
showed
upon
light
irradiation.
presence
styrene,
occurred,
forming
cyclopropane
product.
With
photochemical
method,
demonstrate
malonate
can
be
alternative
precursor
in
formation
complex.
Language: Английский