19.42 Although codeine occurs in low concentration in the opium poppy, most of the codeine used in medicine is prepared from morphine (the principal component of opium) by the following reaction. Explain why selective methylation occurs at only one OH in morphine to give codeine. Codeine is a less potent and less addictive analgesic than morphine. HO HO morphine N [1] KOH [2] CH₂I wwwwww HO codeine N

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter16: Aldehydes And Ketones
Section: Chapter Questions
Problem 16.79P
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19.42 Although codeine occurs in low concentration in the opium poppy, most
of the codeine used in medicine is prepared from morphine (the principal
component of opium) by the following reaction. Explain why selective
methylation occurs at only one OH in morphine to give codeine. Codeine
is a less potent and less addictive analgesic than morphine.
HO
HO
morphine
N
[1] KOH
[2] CH₂I
wwwwww
HO
codeine
N
Transcribed Image Text:19.42 Although codeine occurs in low concentration in the opium poppy, most of the codeine used in medicine is prepared from morphine (the principal component of opium) by the following reaction. Explain why selective methylation occurs at only one OH in morphine to give codeine. Codeine is a less potent and less addictive analgesic than morphine. HO HO morphine N [1] KOH [2] CH₂I wwwwww HO codeine N
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