The Preparation of α-Phosphonovinylzirconocenes and their Application in the Stereospecific Synthesi

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Hydrozirconation of 1-alkylnylphosphonates gives the organozirconium(IV) complexes 2 in syn-addition way. Complexs 2 was trapped with NCS,NBS or I2 to afford stereodifinedα-halo-1-alkenylphosphonates in moderate to high yields.
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