Chapter 11: Q22. (page 447)
Question: Devise a synthesis of from two-carbon starting materials.
Short Answer
Answer
Synthesis of

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Chapter 11: Q22. (page 447)
Question: Devise a synthesis of from two-carbon starting materials.
Answer
Synthesis of

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Question: Draw the products formed in each reaction and indicate stereochemistry.
a.
b. 
c. 
d. 
Question: N-Chlorosuccinimide (NCS) serves as a source of Cl+in electrophilic addition reactions to alkenes and alkynes. Keeping this in mind, draw a stepwise mechanism for the following addition to buy-2-yne.

Question: What acetylide anion and alkyl halide can be used to prepare each alkyne? Indicate all possibilities when more than one route will work.
a.
b.
c.
Question: Draw the enol tautomer of (a) and the keto tautomer of (b).
a.

b. 
Question: Use retrosynthetic analysis to show how hex-3-yne can be prepared from acetylene and any other organic and inorganic compounds. Then draw the synthesis in the synthetic direction, showing all needed reagents.
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