- A
phosphorane (IUPAC name: λ5-phosphane) is a
functional group in
organophosphorus chemistry with
pentavalent phosphorus.
Phosphoranes have the general...
- of the
Mitsunobu esterification reaction. Part I. The
involvement of
phosphoranes and
oxyphosphonium salts". The
Journal of
Organic Chemistry. 54 (13):...
- with phenyllithium.[citation needed]
Phosphorus ylides are
unsaturated phosphoranes,
known as
Wittig reagents, e.g. CH2P(C6H5)3.
These compounds feature...
- on
cyclic phosphites have
revealed the
presence of both
pentavalent phosphoranes and
tetravalent phosphonium intermediates in
chemical equilibrium being...
- of
expanded octet structures for
functional groups like
sulfones and
phosphoranes, in
order to
avoid the
drawing of a
large number of
formal charges or...
- on the
Wittig Reaction of 2,2-Dimethylpropanal and Tributylbutylidene-
phosphorane",
Tetrahedron Lett., 30, 1361–1364 (1989)
Bruce E. Maryanoff, A. B. Reitz...
-
involves reaction of an
aldehyde or
ketone with a
Wittig reagent (or
phosphorane) of the type Ph3P=CHR to
produce an
alkene and Ph3P=O. The
Wittig reagent...
- interaction.
Optimized Geometry HOMO LUMO
Pentacoordinate phosphetanes, or
phosphoranes,
present an
alternative geometric mantle on
which a P(V)
phosphorus center...
-
lithium to
intermediate 2
which undergoes a phosphate–
phosphorane rearrangement to
phosphorane 3
which on
reaction with
acetic acid
gives alcohol 4. Once...
-
intermediate to a
second molecule of
aldehyde leads either to
cyclic phosphoranes 1 or
linear alkyl transfer products 2. More
practical is the use of silylated...
