-
disrotatory describe the
relative sense of bond
rotation involved in
electrocyclic ring-opening and -closing reactions. In a
disrotatory process, the breaking...
- In
organic chemistry, an
electrocyclic reaction is a type of pericyclic,
rearrangement reaction where the net
result is one pi bond
being converted into...
- In
organic chemistry, an
electrocyclic reaction can
either be
classified as
conrotatory or
disrotatory based on the
rotation at each end of the molecule...
- 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...
- precorrin-8x to
hydrogenobyrinic acid non-enzymatic,
photochemical electrocyclic ring
opening and a (1,7)
sigmatropic hydride shift in
vitamin D synthesis...
- and then the ring
reforms electrocyclically: This same
mechanistic process is seen below,
without the
final electrocyclic ring-closing reaction, in the...
- ring-opening via an
electrocyclic reaction (at
least formally) to give the allene.
Several different mechanisms for the
electrocyclic rearrangement have...
- in
electrocyclic reactions,
defined as "the
preference for
inward or
outward rotation of
substituents in
conrotatory or
disrotatory electrocyclic reactions...
- 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...
