Tungsten Wittig reagents: an efficient synthesis of α-functionalised tri- and tetrasubstituted alkenes
Abstract
The reaction of tungsten alkylidene complexes of the type W(
CR1R2)X2Y2 with organic carbonyl groups is shown to enable a variety of di-, tri-, and tetra-substituted alkenes to be synthesised directly, including enol ethers and enamines.
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