4) Predict the major product(s) for the following reactions WH-DASS 40 (a) (b) HO OH Shabnuo gricH₂SO4 olln't sit t CO NH₂ SEOK H3O*

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**Exercise 4: Predict the Major Product(s) for the Following Reactions**

**(a) Reaction Details:**

- **Reactant:** A benzene ring with an acetone substituent (phenyl-acetone).
- **Reagent:** Ethylene glycol (HO-CH2-CH2-OH).
- **Catalyst/Condition:** Sulfuric acid (H2SO4).

**Explanation:** This reaction involves the protection of the carbonyl group in phenyl acetone by forming an acetal with ethylene glycol under acidic conditions. The expected major product is an acetal where the carbonyl oxygen is replaced by ethylene glycol forming a cyclic acetal.

---

**(b) Reaction Details:**

- **Reactant:** Cyclohexanone.
- **Reagent:** Ethylamine (CH3CH2NH2).
- **Catalyst/Condition:** Hydronium ion (H3O+).

**Explanation:** This reaction involves the formation of an imine from cyclohexanone and ethylamine under acidic conditions. The oxygen of the carbonyl group is replaced by an imine group, resulting in the formation of a cyclohexylidene amine (Schiff base).

---

These reactions represent common carbonyl chemistry, illustrating acetal and imine formation, which are important in synthetic organic chemistry for protecting carbonyl groups and forming new carbon-nitrogen bonds, respectively.
Transcribed Image Text:**Exercise 4: Predict the Major Product(s) for the Following Reactions** **(a) Reaction Details:** - **Reactant:** A benzene ring with an acetone substituent (phenyl-acetone). - **Reagent:** Ethylene glycol (HO-CH2-CH2-OH). - **Catalyst/Condition:** Sulfuric acid (H2SO4). **Explanation:** This reaction involves the protection of the carbonyl group in phenyl acetone by forming an acetal with ethylene glycol under acidic conditions. The expected major product is an acetal where the carbonyl oxygen is replaced by ethylene glycol forming a cyclic acetal. --- **(b) Reaction Details:** - **Reactant:** Cyclohexanone. - **Reagent:** Ethylamine (CH3CH2NH2). - **Catalyst/Condition:** Hydronium ion (H3O+). **Explanation:** This reaction involves the formation of an imine from cyclohexanone and ethylamine under acidic conditions. The oxygen of the carbonyl group is replaced by an imine group, resulting in the formation of a cyclohexylidene amine (Schiff base). --- These reactions represent common carbonyl chemistry, illustrating acetal and imine formation, which are important in synthetic organic chemistry for protecting carbonyl groups and forming new carbon-nitrogen bonds, respectively.
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