1 / 13

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. Syn reduction of Alkynes to Alkenes

taima
Download Presentation

Alkene Preparation Reactions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Alkene Preparation Reactions • Alkyne reductions • Syn orientation • Anti orientation • Elimination reactions • Alcohol dehydration • Alkyl halide dehydrohalogenation • Vicinal dihalide dehalogenation

  2. 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

  3. Alkenes via Alkyne Reduction

  4. Alcohol Elimination • E-1 • Unimolecular kinetics • Carbocation intermediates • Skeletal rearrangements possible

  5. Alkenes via Alcohol Dehydration

  6. Dehydrohalogenation of Alkyl Halides Unimolecular versus Bimolecular elimination

  7. BimolecularDehydrohalogenation of Alkyl Halides Periplanar anti-elimination

  8. Dehalogenation of Vicinal Dihalides • E-2 • Bimolecular kinetics • Periplanar Anti-orientation • No skeletal rearrangements possible

  9. E-2 Dehalogenation of Vicinal Dihalides Periplanar anti-elimination

  10. Alkyne Preparation Reactions • Elimination • Vicinal tetrahalide dehalogenation • Vicinal dihalide dehydrohalogenation • Substitution • Alkynyl anion synthesis

  11. Vicinal Tetrahalide Dehalogenation

  12. Vicinal Dihalide Dehydrohalogenation

  13. Substitution Alkynyl Anion Synthesis of Alkynes via Bimolecular Nucleophilic Substitution

More Related