propose a mechanism for the synthesis of 4-hexyn-3-ol from acetylene and propanal.

Question

Question

science chemistry

Answer 1

Answer #1

Answer:-

Mechanism:-

Step 1, is the oxidation of propanol to propanal by using PCC as an oxidizing agent. The propanal formed in the step 5, of this mechanism.

Step 2, is deprotonation of acetylene using one equivalent of NaNH₂ (base).

Step 3, is the methylation of anion.

Step 4, is another deprotonation.

Step 5, is the nucleophilic addition reaction.

Step 6, is protonation.

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Answer 2

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