Question

I need some help in here please!

a)  Give the major product of the following reaction (after aqueous workup). If no reaction occurs, draw the starting material. There are two products of this reaction. Draw the one that contains the saturated (nonaromatic) six-membered ring.

Ph3P-CH2

b) Give the major product of the following reaction (after aqueous workup). If no reaction occurs, draw the starting material. There are two products of this reaction. Draw the one that contains the five-membered ring.

Ph3P-СНСНЗ

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Answer #1

These reactions are the examples of Wittig reactions where the reaction takes place between the carbonyl compound and the ylide.

The product will be an alkene . The alkene has two isomers cis and trans but the trans isomer is more stable.

The detail reaction mechanisms are shown below.

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