Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(44)
Published: Sept. 16, 2022
Fluorinated
fused
rings
are
challenging
to
construct
from
simple
starting
materials.
Herein,
we
report
the
first
photocatalyzed
cascade
reactions
of
readily
available
cyclopropanols
and
α-trifluoromethyl-substituted
olefins
for
synthesis
gem-difluorooxetanes.
Two
three
bonds
were
efficiently
constructed
in
one
reaction.
The
reaction
showed
broad
substrate
scope
downstream
transformations
products
demonstrated
synthetic
potential
mechanistic
study
supported
presence
photoredox
catalysis
energy
transfer
catalysis/direct
photo-excitation
processes.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(36), P. 16535 - 16544
Published: Sept. 2, 2022
The
development
of
unconventional
strategies
for
the
activation
ammonia
(NH3)
and
water
(H2O)
is
capital
importance
advancement
sustainable
chemical
strategies.
Herein
we
provide
synthesis
characterization
a
radical
equilibrium
complex
based
on
bismuth
featuring
an
extremely
weak
Bi–O
bond,
which
permits
in
situ
generation
reactive
Bi(II)
species.
ensuing
organobismuth(II)
engages
with
various
amines
alcohols
exerts
unprecedented
effect
onto
X–H
leading
to
low
BDFEX–H.
As
result,
N–H
O–H
bonds─including
water─occurs
seconds
at
room
temperature,
delivering
well-defined
Bi(III)-amido
-alkoxy
complexes.
Moreover,
demonstrate
that
resulting
Bi(III)–N
complexes
engage
unique
reactivity
pattern
triad
H+,
H–,
H•
sources,
thus
providing
alternative
pathways
main
group
chemistry.
