Alkene preparation reactions
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Alkene Preparation Reactions. Alkyne reductions Syn orientation Anti orientation Elimination reactions Alcohol dehydration Alkyl halide dehydrohalogenation Vicinal dihalide dehalogenation. Alkenes via Alkyne Reduction. Syn reduction of Alkynes to Alkenes

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Alkene Preparation Reactions

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Alkene preparation reactions

Alkene Preparation Reactions

  • Alkyne reductions

    • Syn orientation

    • Anti orientation

  • Elimination reactions

    • Alcohol dehydration

    • Alkyl halide dehydrohalogenation

    • Vicinal dihalide dehalogenation


Alkenes via alkyne reduction

Alkenes via Alkyne Reduction

  • Syn reduction of Alkynes to Alkenes

    • Catalytic Hydrogenation using a poisoned catalyst

  • Anti reduction of Alkynes to Alkenes

    • Dissolving Metal reduction


  • Alkenes via alkyne reduction1

    Alkenes via Alkyne Reduction


    Alcohol elimination

    Alcohol Elimination

    • E-1

    • Unimolecular kinetics

    • Carbocation intermediates

    • Skeletal rearrangements possible


    Alkenes via alcohol dehydration

    Alkenes via Alcohol Dehydration


    Dehydrohalogenation of alkyl halides

    Dehydrohalogenation of Alkyl Halides

    Unimolecular versus Bimolecular elimination


    Bimolecular dehydrohalogenation of alkyl halides

    BimolecularDehydrohalogenation of Alkyl Halides

    Periplanar anti-elimination


    Dehalogenation of vicinal dihalides

    Dehalogenation of Vicinal Dihalides

    • E-2

    • Bimolecular kinetics

    • Periplanar Anti-orientation

    • No skeletal rearrangements possible


    E 2 dehalogenation of vicinal dihalides

    E-2 Dehalogenation of Vicinal Dihalides

    Periplanar anti-elimination


    Alkyne preparation reactions

    Alkyne Preparation Reactions

    • Elimination

      • Vicinal tetrahalide dehalogenation

      • Vicinal dihalide dehydrohalogenation

    • Substitution

      • Alkynyl anion synthesis


    Vicinal tetrahalide dehalogenation

    Vicinal Tetrahalide Dehalogenation


    Vicinal dihalide dehydrohalogenation

    Vicinal Dihalide Dehydrohalogenation


    Substitution

    Substitution

    Alkynyl Anion Synthesis of Alkynes via Bimolecular Nucleophilic Substitution


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