- In
organic chemistry, an
electrocyclic reaction is a type of
pericyclic rearrangement where the net
result is one pi bond
being converted into one sigma...
-
disrotatory describe the
relative sense of bond
rotation involved in
electrocyclic ring-opening and -closing reactions. In a
disrotatory process, the breaking...
- An
electrocyclic reaction can
either be
classified as
conrotatory or
disrotatory based on the
rotation at each end of the molecule. In
conrotatory mode...
- precorrin-8x to
hydrogenobyrinic acid non-enzymatic,
photochemical electrocyclic ring
opening and a (1,7)
sigmatropic hydride shift in
vitamin D synthesis...
-
conjugated double-bond
systems can be
synthesized into
cycloalkenes through electrocyclic reactions.
Addition of heat or
photolysis causes a
reversible reaction...
- and then the ring
reforms electrocyclically: This same
mechanistic process is seen below,
without the
final electrocyclic ring-closing reaction, in the...
- small, that
twist is not
possible and the
reaction is not allowed. An
electrocyclic reaction is a
pericyclic reaction involving the net loss of a pi bond...
-
thermal 6π
disrotatory electrocyclic ring closing. Upon
exposure to
ultraviolet light, it
undergoes a
photochemical 8π
electrocyclic ring
closing to give...
- promoter. The key step of the
reaction mechanism involves a
cationic 4π-
electrocyclic ring
closure which forms the
cyclopentenone product (See
Mechanism below)...
-
carbon atom of a [1, n]-sigmatropic rearrangement, and
conrotation for
electrocyclic ring closure,
while suprafacial corresponds to
retention and disrotation...
