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Yale University

Addition to Form Three-Membered Rings - Carbenoids and Epoxidation

Yale University via YouTube

Overview

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Explore the formation of three-membered rings in organic chemistry through this 51-minute lecture from Yale University's Freshman Organic Chemistry II course. Begin with a drill on the pinacol rearrangement mechanism before delving into molecular-orbital analysis of simultaneous electrophilic/nucleophilic attacks forming three-membered rings from alkenes. Practice using the curved-arrow formalism to describe electron-pair shifts. Examine two potential mechanisms for cyclopropane formation using the Simmons-Smith carbenoid reagent, with theoretical support for the one-step mechanism. Investigate epoxidation of alkenes by peroxycarboxylic acids, focusing on the concerted electrophilic/nucleophilic process. Discuss various paths to epoxides, their stereochemistry, scale, and commercial applications. Gain comprehensive insights into carbenoid reactions and epoxidation processes in organic synthesis.

Syllabus

- Chapter 1. The Pinacol Rearrangement Mechanism
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- Chapter 2. Carbenoids and Simmons-Smith Cyclopropanation
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- Chapter 3. Epoxidation by Peroxycarboxylic Acids
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- Chapter 4. Other Routes to Epoxides
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- Chapter 5. Practical Utility of Epoxides
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