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Author Question: What ylide is needed to prepare 3-ethyl-3-heptene from 3-pentanone using a Wittig reaction? (Read 73 times)

april 19

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on: Feb 17, 2022

Question 1

Which reactants are the best choice to prepare the alkene shown using the Wittig reaction?



◦ butanal and 2-bromopentane/PPh3/n-BuLi
◦ propanal and 2-bromopentane/PPh3/n-BuLi
◦ 2-pentanone and 2-bromopropane/PPh3/n-BuLi
◦ 2-pentanone and 1-bromopropane/PPh3/n-BuLi
◦ ethanal and 2-bromopentane/PPh3/n-BuLi

Question 2

What ylide is needed to prepare 3-ethyl-3-heptene from 3-pentanone using a Wittig reaction?
◦ Ph3P=CHCH2CH3
◦ Ph3P=CHCH2CH2CH3
◦ Ph3P=CH2
◦ Ph3P=CHCH2(CH3)2
◦ Ph3P=CH(CH2CH3)2
Organic Chemistry ¦ Klein ¦ 4th Edition
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Marked as best answer by april 19 on Feb 17, 2022

ALuthy

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Reply #1 on: Feb 17, 2022
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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april 19

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Reply 2 on: Feb 17, 2022
Great answer, keep it coming :)

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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