2) H2O, H+ 1) mCPBA Brz 0504 (cat), NMO Brz, H2O

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2. Draw the products of the reactions below, making sure to specify stereochemistry where applicable.
Transcribed Image Text:2. Draw the products of the reactions below, making sure to specify stereochemistry where applicable.
### Reaction Pathways of Cyclopentene

This image depicts various chemical reactions of cyclopentene, a five-membered carbon ring with a double bond.

1. **Reaction with Br₂ (Bromine)**
   - When cyclopentene is treated with bromine (\( \text{Br}_2 \)), halogenation occurs. This reaction typically results in the addition of bromine atoms across the double bond, converting it into a dibromide.

2. **Osmylation with \( \text{OsO}_4 \)(Cat.), NMO**
   - Osmium tetroxide (\( \text{OsO}_4 \)), in the presence of a catalytic amount, with N-Methylmorpholine N-oxide (NMO), results in the dihydroxylation of the alkene. This adds OH groups across the double bond of cyclopentene, forming a vicinal diol.

3. **Bromine in Water (\( \text{Br}_2, \text{H}_2\text{O} \))**
   - Treating cyclopentene with bromine in the presence of water leads to bromohydrin formation. One bromine atom and one hydroxyl group are added across the double bond.

4. **Epoxidation and Hydrolysis**
   - Using m-CPBA (meta-Chloroperoxybenzoic acid):
     1. Epoxidation step forms an epoxide from the alkene.
     2. Subsequent hydrolysis with water in acidic conditions results in the opening of the epoxide ring to give a diol.

This schematic helps illustrate the range of transformations possible with cyclopentene, showcasing its reactivity with different reagents and highlighting the versatile nature of alkene chemistry.
Transcribed Image Text:### Reaction Pathways of Cyclopentene This image depicts various chemical reactions of cyclopentene, a five-membered carbon ring with a double bond. 1. **Reaction with Br₂ (Bromine)** - When cyclopentene is treated with bromine (\( \text{Br}_2 \)), halogenation occurs. This reaction typically results in the addition of bromine atoms across the double bond, converting it into a dibromide. 2. **Osmylation with \( \text{OsO}_4 \)(Cat.), NMO** - Osmium tetroxide (\( \text{OsO}_4 \)), in the presence of a catalytic amount, with N-Methylmorpholine N-oxide (NMO), results in the dihydroxylation of the alkene. This adds OH groups across the double bond of cyclopentene, forming a vicinal diol. 3. **Bromine in Water (\( \text{Br}_2, \text{H}_2\text{O} \))** - Treating cyclopentene with bromine in the presence of water leads to bromohydrin formation. One bromine atom and one hydroxyl group are added across the double bond. 4. **Epoxidation and Hydrolysis** - Using m-CPBA (meta-Chloroperoxybenzoic acid): 1. Epoxidation step forms an epoxide from the alkene. 2. Subsequent hydrolysis with water in acidic conditions results in the opening of the epoxide ring to give a diol. This schematic helps illustrate the range of transformations possible with cyclopentene, showcasing its reactivity with different reagents and highlighting the versatile nature of alkene chemistry.
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