-
reactions occur frequently in nature. One of the most
common such
electrocyclizations is the
biosynthesis of
vitamin D3. The
first step
involves a photochemically...
-
azomethine ylides are
capable of [1,5]- and [1,7]-
electrocyclizations. An
example of a [1,7]-
electrocyclization of a diphenylethenyl-substituted azomethine...
- reactions,
including sigmatropic reactions and cycloadditions, and
electrocyclizations, can be
classified as
either suprafacial or antarafacial, and this...
-
yield for E-Z
isomerization is very
rarely greater than 0.5. 6π
electrocyclizations of the Z form,
leading to an
additional bond
between the two aryl...
-
further thermally allowed sequential 6π
electron and 8π
electron electrocyclizations. The
Nicolaou group therefore sought to
synthesize endiandric acid...
- 3-butadiene (a 4π-
electrocyclization) is [π4a]. The
conrotatory electrocyclic ring
opening of
cyclobutene (a
reverse 4π-
electrocyclization) is [σ2a + π2s]...
- with
structural complexity. Additionally, W(CO)5(THF)
facilitates electrocyclization processes. In
these reactions, the tungsten-bound
alkyne undergoes...
- PMID 27722705. Lee YR, Kim JH (2007). "Efficient
Synthesis of
Polycycles by
Electrocyclizations of
Substituted Trihydroxybenzenes:
Synthesis of
Rubranine and Deoxybruceol"...
- products. The
mechanism of this
reaction is
proposed to be a 4-π
electrocyclization very much like the
Nazarov cyclization reaction. To
obtain the 2-furyl...
- rare
example of a
stereoselective pericyclic reaction,
whereas most
electrocyclizations are stereospecific. The
example below uses
triethylsilane to trap...
