Organic & Biomolecular Chemistry,
Год журнала:
2025,
Номер
23(10), С. 2400 - 2410
Опубликована: Янв. 1, 2025
In
this
study,
we
present
the
first
catalytic
methodology
for
synthesizing
N-methyl
secondary
amides
via
dehydrative
condensation
of
hydroxycarboxylic
acids
with
readily
available
and
safe
aqueous
methylamine,
employing
diboronic
acid
anhydride
(DBAA)
as
catalyst.
DBAA
catalysis
can
also
be
applied
to
direct
amidations
using
ethylamine
or
dimethylamine.
Moreover,
demonstrate
applicability
system
concise
synthesis
eight
biologically
active
compounds
containing
β-amino
alcohol
motifs,
including
halostachine,
synephrine,
longimammine,
phenylephrine,
metanephrine,
normacromerine,
etilefrine,
macromerine.
Advanced Synthesis & Catalysis,
Год журнала:
2023,
Номер
365(24), С. 4359 - 4391
Опубликована: Ноя. 7, 2023
Abstract
Amide
bond
construction
has
garnered
significant
interest
in
recent
decades
due
to
amides
being
one
of
the
most
prevalent
functional
groups
among
bioactive
molecules.
Out
thirty‐seven
new
drugs
approved
by
FDA
2022,
eleven
are
small
molecules
containing
at
least
amide
bond.
Additionally,
there
nineteen
large
as
drugs,
some
which
have
peptide
structures,
and
therefore,
also
bear
bonds.
In
years,
multiple
teams
embraced
challenge
developing
more
efficient
methods
for
formation.
This
dedication
led
numerous
publications
appearing
monthly
prestigious
journals,
showcasing
advancements
this
field.
The
primary
goal
review
is
present
viable
strategies
constructing
It
crucial
differentiate
between
formation
synthesis;
hence,
focus
on
describing
specific
forming
C(O)−N
particular,
concentrates
developed
within
last
six
years.
There
a
particular
emphasis
approaches
that
consider
thought
process
when
selecting
starting
materials
groups.
approach
ensures
coverage
all
common
chemical
transformations
yield
Abstract
Amide
bond
forming
reactions
are
critical
for
both
polypeptide
synthesis
and
medicinal
chemistry.
Most
current
approaches
amidation
employ
stoichiometric
activating
agents,
but
such
methods
neither
atom
economical
nor
synthetically
elegant.
Catalytic
potentially
green
more
ideal
substitutes
standard
thus
the
subject
of
this
review.
Such
face
significant
thermodynamic
kinetic
barriers
have,
as
a
result,
historically
conceded
use
elevated
temperatures
dehydrating
agents
or
lacked
broad
relevant
substrate
scopes
from
perspective
peptide
Recent
advancements
in
direct
(the
coupling
carboxylic
acid
an
amine)
indirect
other
partners
resulting
amide
bond)
based
on
aryl
boronic
acids,
transition
metals
organocatalysis
former
ester
redox‐coupled
later,
address
these
previous
shortcomings
examined
therein.
Organic Chemistry Frontiers,
Год журнала:
2023,
Номер
10(7), С. 1817 - 1846
Опубликована: Янв. 1, 2023
Active
ester
method
is
an
efficient
strategy
to
address
the
notorious
racemization/epimerization
issue
of
peptide
bond
formation.
Herein,
pros
and
cons
using
active
esters
for
synthesis
were
systematically
summarized
analyzed.
Catalysts,
Год журнала:
2023,
Номер
13(2), С. 366 - 366
Опубликована: Фев. 7, 2023
The
prevalence
of
amides
in
biological
systems
and
chemical
fields
such
as
polymers,
materials
natural
products
drives
continuous
research
on
novel
procedures
to
obtain
these
ubiquitous
functional
groups.
Currently,
efforts
this
purpose
are
mainly
focused
around
the
discovery
direct
catalytic
methods
that
more
atom
economic,
safe
practical
for
diversified
applications
(e.g.,
organic,
medicinal
peptide
chemistries,
material
polymer
purposes,
etc.),
accordance
with
green
chemistry
principles.
field
amide
synthesis
has
attained
a
level
significance
number
reviews
articles
addressing
it
grown
exponentially
last
decade.
Rather
than
providing
general
overview
amidation
methods,
which
have
been
described
broadly
well
recent
literature,
review
is
highlight
formation
bonds
from
amines
carboxylic
acids
or
esters.
goal
emphasize
mechanistic
aspects,
but
also
discuss
substrate
tolerance
racemization
issues
(when
applicable).
The Journal of Organic Chemistry,
Год журнала:
2023,
Номер
88(5), С. 2832 - 2840
Опубликована: Фев. 15, 2023
A
commercially
available
and
versatile
dehydrative
amidation
catalyst,
featuring
a
thianthrene
boron
acid
structure,
has
been
developed.
The
catalyst
shows
high
catalytic
activity
to
both
aliphatic
less
reactive
aromatic
carboxylic
substrates,
including
several
bioactive
or
clinical
molecules
with
group.
Chemical Science,
Год журнала:
2023,
Номер
14(13), С. 3462 - 3469
Опубликована: Янв. 1, 2023
Technology
for
generating
especially
important
amide
and
peptide
bonds
from
carboxylic
acids
amines
that
avoids
traditional
coupling
reagents
is
described.
The
1-pot
processes
developed
rely
on
thioester
formation,
neat,
using
a
simple
dithiocarbamate,
are
safe
green,
Nature-inspired
thioesters
then
converted
to
the
targeted
functionality.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
A
new
borate
ester
amidation
catalyst
was
developed,
that
shows
higher
reactivity
with
challenging
carboxylic
acids
and
amines.
Reactions
could
be
performed
on
multigram
scale
the
generated
in
situ
from
commercial
reagents.
ACS Catalysis,
Год журнала:
2021,
Номер
11(13), С. 7647 - 7658
Опубликована: Июнь 10, 2021
Peptide
bond
formation
is
a
challenging,
environmentally
and
economically
demanding
transformation.
Catalysis
key
to
circumvent
current
bottlenecks.
To
date,
many
homogeneous
catalysts
able
provide
synthetically
useful
methods
have
been
developed,
while
heterogeneous
remain
largely
restricted
the
studies
addressing
prebiotic
of
peptides.
Here,
catalytic
activity
Zr6-based
metal–organic
frameworks
(Zr-MOFs)
toward
peptide
investigated
using
dipeptide
cyclization
as
model
reaction.
Unlike
previous
catalysts,
Zr-MOFs
tolerate
water,
reactions
are
carried
out
under
ambient
conditions.
Notably,
catalyst
recyclable
no
additives
activate
COOH
group
necessary,
which
common
limitations
methods.
In
addition,
broad
reaction
scope
tolerates
substrates
with
bulky
Lewis
basic
groups.
The
mechanism
was
assessed
by
detailed
mechanistic
computational
features
acid
activation
carboxylate
groups
Zr
centers
amine
addition
in
an
alkoxy
ligand
on
adjacent
sites
assists
lowering
barrier
proton
transfers.
proposed
concepts
were
also
used
study
intermolecular
formation.
While
intrinsic
challenges
associated
structure
water
removal
limit
more
general
conditions,
results
suggest
that
further
design
Zr-MOF
could
render
these
materials
broadly
for
this
challenging
ACS Catalysis,
Год журнала:
2020,
Номер
10(16), С. 9594 - 9603
Опубликована: Июль 31, 2020
The
epimerization-free
formation
of
peptide
bonds
is
crucial
for
the
development
therapeutics
and
pharmaceuticals.
Herein,
we
report
a
hydrosilane-mediated
approach
construction
between
most
amino
acids
under
ambient
conditions.
This
concise
protocol
with
an
original
silylating
reagent
HSi(OCH(CF3)2)3
facilitates
use
bearing
broad
variety
functional
groups
without
any
epimerization.
Moreover,
catalytic
system
using
aminosilane
catalyst
enables
not
only
acceleration
in
silylation
carboxylic
but
also
amide
synthesis
minimal
substrate
(electrophile/nucleophile/silylating
=
1:1:1)
waste
production
(hydrogen
gas
siloxane).
These
simple
powerful
approaches
are
established
as
potentially
general
paradigm
desired
peptides
high
yields.