Question

Draw the major organic product(s) of the following reaction (multiple products may be drawn in one box):

Answer 1

Concepts and reason

The concept used is to draw the major product of the reaction.

Fundamentals

Alcohols undergo elimination reaction with ${{\rm{H}}_3}{\rm{P}}{{\rm{O}}_4}$ in the presence of heat and form alkenes with the loss of water molecule.

The reaction follows $E1$ mechanism and the major product follows Zaitsev’s rule.

In $E1$ mechanism, a carbocation intermediate is formed.

According to this rule, more substituted alkene is the major product of the reaction.

Alcohols react with ${{\rm{H}}_3}{\rm{P}}{{\rm{O}}_4}$ in the presence of heat and undergo elimination reaction to form alkene products.

The product of the given reaction is as follows:

After the formation of the carbocation, there are two possible $\beta -$ H atoms that can be lost.

The $\beta -$ H is lost from the other possible carbon atoms and the minor product is formed.

The reaction forming the minor product is as follows:

Ans:

The complete reaction is as follows: