2) Give more yield in cross Aldol condensation p-methyl benzaldehyde . p-methoxy benzaldehyde, benzaldehyde ,p-nitro benzaldehyde 3) Stability of carbanion ion 요 11 CH₂ CN CHy°C-OCH3 -OCH₁ . . CH₂-C-CH₁ CH₂NO₂ .

2) Give more yield in cross Aldol condensation p-methyl benzaldehyde . p-methoxy benzaldehyde, benzaldehyde ,p-nitro benzaldehyde 3) Stability of carbanion ion 요 11 CH₂ CN CHy°C-OCH3 -OCH₁ . . CH₂-C-CH₁ CH₂NO₂ .

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter23: Carbonyl Condensation Reactions

Section23.3: Dehydration Of Aldol Products: Synthesis Of Enones

Problem 4P

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Concept explainers

Reactions at the Alpha Carbon Atom

The position next to the ketone or aldehyde functional group is termed as alpha position and the reaction which occurs at alpha position is called alpha substitution reaction. In an alpha substitution reaction, the alpha proton atom is substituted by an electrophile by the formation of an enol intermediate or enolate ion intermediate. Most of the carbonyl compounds go through an alpha substitution reaction.

Question

2) Give more yield in cross Aldol condensation
p-methyl benzaldehyde . p-methoxy benzaldehyde, benzaldehyde .p-nitro benzaldehyde
3) Stability of carbanion ion
요
CH₂ CN
CHy°C-OCH3
11
-OCH₂
.
CH₂-C-CH₁ CH₂NO₂
.
.

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