14.16 Predict the products for each of the following reactions: (a) (c) -OH OH to -0-0-H TOCH(CH3)214 (+)-DET -0-0-H Ti[OCH(CH3)214 (+)-DET ? ? (b) (d) OH -OH -0-0-H T[OCH(CH3)214 (-)-DET -0-0-H Ti[OCH(CH3)214 (-)-DET ?

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### Reaction Products Prediction

#### Objective:
Predict the products for each of the following reactions involving allylic alcohols and titanium-based catalysts with diethyl tartrate.

#### Reactions:

1. **Reaction (a)**
   - **Reactants:**
     - Cyclohexen-1-ylmethanol
     - Reagents: Ti(OCH(CH_3)_2)_4, (+)-DET, t-Butyl hydroperoxide
   - **Expected Product:** To be predicted

2. **Reaction (b)**
   - **Reactants:**
     - 3-penten-2-ol (an allylic alcohol)
     - Reagents: Ti(OCH(CH_3)_2)_4, (-)-DET, t-Butyl hydroperoxide
   - **Expected Product:** To be predicted

3. **Reaction (c)**
   - **Reactants:**
     - Prop-2-en-1-ol (an allylic alcohol)
     - Reagents: Ti(OCH(CH_3)_2)_4, (+)-DET, t-Butyl hydroperoxide
   - **Expected Product:** To be predicted

4. **Reaction (d)**
   - **Reactants:**
     - 3-buten-2-ol (an allylic alcohol)
     - Reagents: Ti(OCH(CH_3)_2)_4, (-)-DET, t-Butyl hydroperoxide
   - **Expected Product:** To be predicted

#### Explanation:
These reactions involve the Sharpless asymmetric epoxidation, where an allylic alcohol is converted into an epoxide. The stereoselectivity of the reaction is guided by the chirality of diethyl tartrate (DET). The orientation of the epoxide in the product depends on whether (+)-DET or (-)-DET is used.

- (+)-DET typically favors the formation of the epoxide on one face of the double bond.
- (-)-DET usually favors the formation of the epoxide on the opposite face.

#### Notes:
- **Ti(OCH(CH_3)_2)_4:** Titanium isopropoxide, a catalyst in the reaction
- **DET:** Diethyl tartrate, provides chiral environment
- **t-Butyl Hydroperoxide:** An oxidizing agent

By identifying the specific stereochemical outcome for each starting material and reagent combination, one can predict the precise 3D orientation of the resultant
Transcribed Image Text:### Reaction Products Prediction #### Objective: Predict the products for each of the following reactions involving allylic alcohols and titanium-based catalysts with diethyl tartrate. #### Reactions: 1. **Reaction (a)** - **Reactants:** - Cyclohexen-1-ylmethanol - Reagents: Ti(OCH(CH_3)_2)_4, (+)-DET, t-Butyl hydroperoxide - **Expected Product:** To be predicted 2. **Reaction (b)** - **Reactants:** - 3-penten-2-ol (an allylic alcohol) - Reagents: Ti(OCH(CH_3)_2)_4, (-)-DET, t-Butyl hydroperoxide - **Expected Product:** To be predicted 3. **Reaction (c)** - **Reactants:** - Prop-2-en-1-ol (an allylic alcohol) - Reagents: Ti(OCH(CH_3)_2)_4, (+)-DET, t-Butyl hydroperoxide - **Expected Product:** To be predicted 4. **Reaction (d)** - **Reactants:** - 3-buten-2-ol (an allylic alcohol) - Reagents: Ti(OCH(CH_3)_2)_4, (-)-DET, t-Butyl hydroperoxide - **Expected Product:** To be predicted #### Explanation: These reactions involve the Sharpless asymmetric epoxidation, where an allylic alcohol is converted into an epoxide. The stereoselectivity of the reaction is guided by the chirality of diethyl tartrate (DET). The orientation of the epoxide in the product depends on whether (+)-DET or (-)-DET is used. - (+)-DET typically favors the formation of the epoxide on one face of the double bond. - (-)-DET usually favors the formation of the epoxide on the opposite face. #### Notes: - **Ti(OCH(CH_3)_2)_4:** Titanium isopropoxide, a catalyst in the reaction - **DET:** Diethyl tartrate, provides chiral environment - **t-Butyl Hydroperoxide:** An oxidizing agent By identifying the specific stereochemical outcome for each starting material and reagent combination, one can predict the precise 3D orientation of the resultant
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