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Chapter 21: 17P (page 817)

Draw the products of the following Wittig reactions
a.
b.

Short Answer

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Step by step solution

Wittig reaction

The treatment of a carbonyl compound with triphenylphosphonium ylide forms an alkene. Tiphenylphosphonium ylide is known as the Wittig reagent.

Product formation

The reaction of propan-2-one with Ph₃P=CH₂ is shown below:

Product formation in a

The reaction of cyclopentanone with Ph₃P=CHCH₂ CH₂ CH₂ CH₃is shown below:

Product formation in b

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Most popular questions from this chapter

Which carbonyl group in each pair absorbs at a higher frequency?

Compounds A and B have molecular formula C₉H₁₀O . Identify their structures from the ¹HNMR and IR spectra given.

What 1° amine and carbonyl compound are needed to prepare each imine?

Devise a synthesis of each alkene using a Wittig reaction to form the double bond. You may use benzene and organic alcohols having four or fewer carbons as starting materials and any required reagents

What starting materials are needed to prepare each alkene by a Wittig reaction? When there are two possible routes, indicate which route, if any, is preferred.