Dilithiated phosphazenes: scaffolds for the synthesis of olefins through a new class of bicyclic 1,2-oxaphosphetanes†
Abstract
The first examples of the PN-directed dilithiation of (N-methoxycarbonyl)phosphazenes in the Cα and Cortho to the phosphorus, and the use of these dianions in the formation of tri- and tetra-substituted