Double bond geometry – Stereospecific Peterson reaction (Acid elimination – Diastereoisomer 2)

^{Click the structures and reaction arrows in sequence to view the 3D models and animations respectively}

Acid catalysed E2-elimination via anti-periplanar transition state to form predominantly the Z-alkene.

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I. Fleming, A. Barbero and D. Walter, Chem. Rev., 1997, 97, 2063–2192.