https://Leah4sci.com/Alkyne presents: Alkyne Hydroboration Oxidation: Reaction and StepbyStep Mechanism using BH3, B2H6, Sia2BH or 9BBN

Watch Next: Chain Elongation Terminal Alkynes    • Chain Elongation via Alkylation of Te...  

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This video shows you the reaction and mechanism for the hydroboration oxidation of alkynes, in which an alkyne reacts with a boroncontaining reagent, followed by NaOH and H2O2, to form either an aldehyde or ketone product at the less substituted, antiMarkovnikov position.

You’ll learn the stepbystep alkyne hydroboration oxidation mechanism, including Keto Enol Tautomerization to isomerize an unstable enol intermediate in a basic environment.
Finally you’ll learn about the regioselectivity of the reaction and compare the products when starting with terminal, symmetric or asymmetric internal alkynes.

↪ Links & Resources Mentioned In This Video ↩
▸Alkyne Reaction Series + Cheat Sheet https://Leah4sci.com/alkyne

▸Alkene Hydroboration Oxidation    • Hydroboration Oxidation of Alkenes Re...  
▸Alkene Reaction Shortcuts    • Alkene Reaction Shortcuts and Product...  
▸Alkene Reaction Series + Cheat Sheet https://Leah4sci.com/alkene
▸Keto Enol Tautomerization https://Leah4sci.com/KET
▸Markovnikov’s Rule https://Leah4sci.com/markovnikov



⏱ In this video:
[0:19] Overview of Alkyne Hydroboration
[0:58] Review of Alkene Hydroboration
[2:31] Boron Reagents
[4:44] Mechanism for Alkyne Hydroboration
[9:50] Regioselectivity



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