Concept explainers
Interpretation:
The observations for the regiochemical and the stereochemical outcome for the formation of the product given have to be identified.
Concept Introduction:
Ring-opening of
Acid-catalyzed ring-opening of epoxide: The epoxide ring is protonated and the nucleophile attack depends on the electronic or steric effect (nature of epoxide).
Regiochemistry: when the epoxide is unsymmetrical, the nucleophile attack at the more substituted position of the protonated epoxide ring.
Stereochemistry: when the nucleophile attack takes place at chiral center, an inversion of configuration is obtained.
Base catalyzed ring opening of epoxide:
The nucleophile will attack at the less substituted position under basic conditions.
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Organic Chemistry 3rd.ed. Klein Evaluation/desk Copy
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