The above synthesis scheme was designed using the Organic Chemistry Roadmaps in the appendix of your textbook. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene: Step 7 : Step 2 : Step 5
The above synthesis scheme was designed using the Organic Chemistry Roadmaps in the appendix of your textbook. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene: Step 7 : Step 2 : Step 5
The above synthesis scheme was designed using the Organic Chemistry Roadmaps in the appendix of your textbook. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene: Step 7 : Step 2 : Step 5
The above synthesis scheme was designed using the Organic Chemistry Roadmaps in the appendix of your textbook. In this scheme, identify the reagents necessary to accomplish the following steps in the production of (3R,4S)-3,4-dibromohexane from acetylene:
Step 7 : Step 2 : Step 5
Transcribed Image Text:The image depicts a multi-step organic synthesis pathway with various chemical structures and reactions. Here's a detailed description:
1. **Step 5**: This step involves a transformation where a chlorine-substituted alkane (ethyl chloride) undergoes a reaction, leading to the formation of a new compound.
2. **Step 6**: The transformation of a terminal alkyne compound is shown, where acetylene derivatives are involved. This is converted into another chemical structure, likely involving an addition or substitution reaction.
3. **Step 7**: The compound formed in Step 6 undergoes further chemical transformation. The alkyne structure is converted into an intermediate with a longer carbon chain, possibly through an elongation or functionalization process.
4. **Step 8**: This final transformation step shows a compound with two bromine atoms added across the carbon chain, leading to the formation of a dibrominated compound. The stereochemistry is indicated by dashed and wedged bonds for the hydrogen and bromine atoms, showing the three-dimensional configuration of atoms.
Each of these steps is labeled with a number in red, indicating the order of reactions in the pathway. The sequences represent typical transformations in organic chemistry, such as substitutions, additions, and stereochemical alterations.
Transcribed Image Text:This diagram is a flowchart showing several chemical reactions involving alkenes and alkynes, with potential reagents listed at the bottom. The flowchart outlines a series of transformations starting from specific organic compounds and indicates possible reaction pathways.
### Flowchart Description:
1. **Initial Compound:**
- The flowchart begins with ethyne (acetylene, HC≡CH).
2. **Reaction Pathways:**
- **Pathway 1:**
- Ethyne (HC≡CH) is converted into an alkene with a bromine atom (Br) substituent.
- **Pathway 2:**
- Ethylene (H₂C=CH₂) is shown converting into the same compound from Pathway 1 with a Br substituent.
- **Pathway 3:**
- Ethyne (HC≡CH) undergoes a reaction to become a compound with a C≡C bond.
- **Pathway 4:**
- Ethyne (HC≡CH) is converted to a compound with a chlorine atom (Cl) substituent.
- **Pathway 5:**
- The chlorine-containing compound undergoes further reaction to arrive at an alkynyl compound.
- **Pathway 6:**
- The final step in the sequence transforms the alkynyl compound into a different alkene.
### Reagents Table:
The reagents available for each pathway are listed in the table below the flowchart:
- **a.** HCl
- **b.** HBr
- **c.** Br₂
- **d.** Cl₂
- **e.** H₂, Pd
- **f.** OsO₄ then NaHSO₃
- **g.** O₃ then (CH₃)₂S
- **h.** 2 equivalents of NaNH₂
- **i.** H₂ / Lindlar's catalyst
- **j.** Na / NH₃
- **k.** (sia)₂BH then H₂O₂, NaOH
- **l.** 1 equivalent of NaNH₂
Each reagent can be used to achieve specific transformations. For instance, catalysts and bases in different combinations facilitate hydrogenation, halogenation, and other reactions typical in organic synthesis.
Branch of chemistry concerned with the study of carbon-based compounds, also known as organic compounds. These compounds form due to carbon's notable potential in forming chemical bonds. Due to the abundance of organic compounds on Earth, organic chemistry is crucial in other scientific disciplines, including materials science and pharmaceutical science.
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