Dilithiated phosphazenes: scaffolds for the synthesis of olefins through a new class of bicyclic 1,2-oxaphosphetanes.
The first examples of the PN-directed dilithiation of (N-methoxycarbonyl)phosphazenes in the C(alpha) and C(ortho) to the phosphorus, and the use of these dianions in the formation of tri- and tetra-substituted olefins through stereospecific thermolysis of a new type of isolable bicyclic 1,2-oxaphosphetanes are described.
Area de Química Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120, Almería, Spain.
Jesús
J
García-López
Emma
E
Peralta-Pérez
Angela
A
Forcén-Acebal
Santiago
S
García-Granda
Fernando
F
López-Ortiz