- In
organic chemistry, a
sigmatropic reaction (from Gr**** τρόπος (trópos) 'turn') is a
pericyclic reaction wherein the net
result is one
sigma bond (σ-bond)...
-
selection rules for an [i,j]-
sigmatropic rearrangement are as follows: For supra/supra or antara/antara [i,j]-
sigmatropic shifts, if i + j = 4n + 2 they...
- ylide. Many
ylides react in
sigmatropic reactions. The Sommelet-Hauser
rearrangement is an
example of a [2,3]-
sigmatropic reaction. The
Stevens rearrangement...
- 2,3-
Sigmatropic rearrangements are a type of
sigmatropic rearrangements and can be
classified into two types.
Rearrangements of
allylic sulfoxides, amine...
-
rearrangement is an
extensively studied organic reaction involving the [3,3]-
sigmatropic rearrangement of 1,5-dienes. It was
developed by
Arthur C. Cope and Elizabeth...
-
Ludwig Claisen. The
heating of an
allyl vinyl ether will
initiate a [3,3]-
sigmatropic rearrangement to give a γ,δ-unsaturated carbonyl,
driven by exergonically...
-
uncracked dimer. The
hydrogen atoms in
cyclopentadiene undergo rapid [1,5]-
sigmatropic shifts. The
hydride shift is, however,
sufficiently slow at 0 °C to allow...
-
chorismate to
prephenate in
almost all
prototrophic organisms [1,5]-
sigmatropic shift in the
transformation of precorrin-8x to
hydrogenobyrinic acid...
-
unsaturated carbonyl compounds by a
mechanism typical for such a [3,3]-
sigmatropic rearrangement. The
reaction is
highly general: a wide
variety of precursors...
- This is
referred to as the "inverse
electron demand Diels–Alder." A
sigmatropic rearrangement is a
reaction in
which a
sigma bond
moves across a conjugated...
