Predict the major product(s) of each of the following reactions.

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Identify the type of reaction for each substrate and reagent pair. For example, reactions with NaOEt/EtOH typically involve elimination or substitution, while NaCN/THF suggests a nucleophilic substitution.

For reaction (a), the substrate is a tosylate, which is a good leaving group. NaOEt is a strong base/nucleophile, suggesting an E2 elimination reaction, leading to the formation of an alkene.

In reaction (b), the substrate is a tosylate, and NaCN is a good nucleophile. This suggests an SN2 reaction, where the cyanide ion will replace the tosylate group, forming a nitrile.

For reaction (c), the substrate is a tosylate, and NaN3 is a nucleophile. This indicates an SN2 reaction, where the azide ion will replace the tosylate group, forming an azide.

In reaction (d), the substrate is a tosylate, and the reagent is a bulky base (t-BuONa). This suggests an E2 elimination reaction, leading to the formation of an alkene, favoring the less substituted alkene due to steric hindrance (Hofmann product).

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