Diastereotopic Differentiation on Phosphorus Templates via the Ring-Closing Metathesis Reaction

Abstract
A strategy is described in which the ring-closing metathesis reaction is utilized to desymmetrize a number of pseudo-C2-symmetric phosphorus templates 1−3. These reactions give excellent levels of selectivity (12−15:1) with vinyl phosphonamides containing a (E)-Ph group on the diastereotopic olefins. This approach is being developed as an effective method of obtaining P-chiral phosphonamides and phosphonates.

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