Question

Predict the product of the following reaction. PhP o OH y o OH T

Answer 1

Ars: - Phyp. Product Mechanism opha Phyp E- -PPh3 स to=PPh3 Product This is example of wittig reaction. The first step of the wittig reaction as being the attack of the nucleophilic glide carbon on electrophilic carbonyl Carbon. The second step of the wittig is the attack of resulting oxygen at Phosphoteris, giving a 4-membered ring.

The u-membered ring is very short-lived and quickly breaks down , via a process called a reverse [at] cyclo addition, to give the final proderts.