5- In the Wittig reaction, the lide reacts with an aldehyde to form an alkene. Which of the following best describes the stereochemical outcome of a Wittig reaction when using a stabilized ylide?Produces exclusively E-alkenes.• Produces exclusively Z-alkenes.Produces a mix of Z- and E-alkenes, with Z being the major product.Produces a 50:50 mixture of Z- and E-alkenes) Produces a mix of Z- and E-alkenes, with E being the major product. 4- For the synthesis of ethyl 4-chlorocinnamate via the Wittig reaction, which of the following statements is true regarding the mechanism?O The ylide donates a proton to the aldehyde, directly forming the alkene withoutany intermediates.The ylide forms a stable complex with the aldehyde, which is then reduced toform the alkene.The reaction proceeds through a direct displacement mechanism, where the ylide replaces the aldehyde's oxygen.© The phosphonium ylide attacks the carbonyl carbon, forming a betaine intermediate that undergoes rearrangement to yield the product.
5- In the Wittig reaction, the lide reacts with an
Produces exclusively E-
• Produces exclusively Z-alkenes.
Produces a mix of Z- and E-alkenes, with Z being the major product.
Produces a 50:50 mixture of Z- and E-alkenes
) Produces a mix of Z- and E-alkenes, with E being the major product.
4- For the synthesis of ethyl 4-chlorocinnamate via the Wittig reaction, which of the following statements is true regarding the mechanism?
O The ylide donates a proton to the aldehyde, directly forming the alkene without
any intermediates.
The ylide forms a stable complex with the aldehyde, which is then reduced to
form the alkene.
The reaction proceeds through a direct displacement mechanism, where the ylide replaces the aldehyde's oxygen.
© The phosphonium ylide attacks the carbonyl carbon, forming a betaine intermediate that undergoes rearrangement to yield the product.
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