The image presents three organic reaction schemes involving the use of sodium ethoxide (NaOEt) and hydronium ion (H₃O⁺) to promote transformations. **1. Reaction Scheme 1:** - Starting Material: A compound with a ketone and ester group on a chain. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Addition of H₃O⁺. - The reaction involves an intramolecular transformation leading to a cyclic product, likely indicating a type of cyclization reaction facilitated by the base and followed by acidic work-up. **2. Reaction Scheme 2:** - Starting Material: A compound with a benzene ring connected to an ester group, forming a potential chromanone structure. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Addition of H₃O⁺. - The reaction likely proceeds through a mechanism involving enolate formation, which subsequently facilitates a cyclization or rearrangement process resulting in a more fused structure. **3. Reaction Scheme 3:** - Starting Material: A diketone compound with an alternating sequence of ketone and methylene groups. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Reaction conditions leading to a transformation (not explicitly shown). 3. Addition of H₃O⁺, resulting in the formation of an α,β-unsaturated ketone. - The transformation suggests an aldol condensation reaction that proceeds via enolate formation, condensation, and dehydration to form an α,β-unsaturated ketone. The image signifies the use of base-promoted enolate chemistry followed by an acidic workup to generate more complex cyclic or unsaturated products from simpler starting materials.
The image presents three organic reaction schemes involving the use of sodium ethoxide (NaOEt) and hydronium ion (H₃O⁺) to promote transformations. **1. Reaction Scheme 1:** - Starting Material: A compound with a ketone and ester group on a chain. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Addition of H₃O⁺. - The reaction involves an intramolecular transformation leading to a cyclic product, likely indicating a type of cyclization reaction facilitated by the base and followed by acidic work-up. **2. Reaction Scheme 2:** - Starting Material: A compound with a benzene ring connected to an ester group, forming a potential chromanone structure. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Addition of H₃O⁺. - The reaction likely proceeds through a mechanism involving enolate formation, which subsequently facilitates a cyclization or rearrangement process resulting in a more fused structure. **3. Reaction Scheme 3:** - Starting Material: A diketone compound with an alternating sequence of ketone and methylene groups. - Reagents and Conditions: 1. Treatment with NaOEt. 2. Reaction conditions leading to a transformation (not explicitly shown). 3. Addition of H₃O⁺, resulting in the formation of an α,β-unsaturated ketone. - The transformation suggests an aldol condensation reaction that proceeds via enolate formation, condensation, and dehydration to form an α,β-unsaturated ketone. The image signifies the use of base-promoted enolate chemistry followed by an acidic workup to generate more complex cyclic or unsaturated products from simpler starting materials.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Draw the products of the following reactions.
Transcribed Image Text:The image presents three organic reaction schemes involving the use of sodium ethoxide (NaOEt) and hydronium ion (H₃O⁺) to promote transformations.
**1. Reaction Scheme 1:**
- Starting Material: A compound with a ketone and ester group on a chain.
- Reagents and Conditions:
1. Treatment with NaOEt.
2. Addition of H₃O⁺.
- The reaction involves an intramolecular transformation leading to a cyclic product, likely indicating a type of cyclization reaction facilitated by the base and followed by acidic work-up.
**2. Reaction Scheme 2:**
- Starting Material: A compound with a benzene ring connected to an ester group, forming a potential chromanone structure.
- Reagents and Conditions:
1. Treatment with NaOEt.
2. Addition of H₃O⁺.
- The reaction likely proceeds through a mechanism involving enolate formation, which subsequently facilitates a cyclization or rearrangement process resulting in a more fused structure.
**3. Reaction Scheme 3:**
- Starting Material: A diketone compound with an alternating sequence of ketone and methylene groups.
- Reagents and Conditions:
1. Treatment with NaOEt.
2. Reaction conditions leading to a transformation (not explicitly shown).
3. Addition of H₃O⁺, resulting in the formation of an α,β-unsaturated ketone.
- The transformation suggests an aldol condensation reaction that proceeds via enolate formation, condensation, and dehydration to form an α,β-unsaturated ketone.
The image signifies the use of base-promoted enolate chemistry followed by an acidic workup to generate more complex cyclic or unsaturated products from simpler starting materials.
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