Site MapHelpFeedbackPractice Problems
Practice Problems
(See related pages)



1

Stabilized ester enolates are best generated from?
A)an acid.
B)an ester.
C)a b-hydroxy ester.
D)a b-keto ester.
E)an amide.
2

b-keto esters are best generated via?
A)an Aldol reaction.
B)an oxidation of an ester.
C)a Claisen reaction.
D)a Hoffman rearrangement.
E)a reduction of an ester.
3

The reagent usually used in a Claisen reaction is?
A)H2SO4
B)NaOH
C)LiAlH4
D)Cr2O7-2 in H2SO4
E)an alkoxide base
4

The ester used in a Claisen reaction must have two a-hydrogen atoms?
A)true.
B)false.
5

The Dieckmann reaction is?
A)an Aldol condensation.
B)a Claisen condensation.
C)an intramolecular Claisen condensation.
D)an oxidation of an ester.
E)a reduction of an ester.
6

Mixed Claisen reactions require?
A)two substrates where only one can form an enolate ion.
B)two substrates where both can form enolate ions.
C)two substrates where neither can form enolate ions.
D)intermolecular reactions.
E)intramolecular reactions.
7

The product from treating non-enolizable esters and ketones with a strong base are?
A)acids.
B)b-hydroxy esters.
C)b-keto esters.
D)b-keto acids.
E)b-diketones.
8

Ketones can be prepared from _____ via a ____ intermediate?
A)b-ketoacids and acids.
B)acids and b-hydroxyesters.
C)b-ketoesters and b-ketoacids.
D)b-ketoacids and b-ketoesters.
E)b-ketoesters and b-diketones.
9

Anions of b-keto esters are synthetically equivalent to?
A)ketones.
B)ketone enolates.
C)acids.
D)acid enolates.
E)ester enolates.
10

Malonic acid esters are useful in preparing?
A)alcohols.
B)aldehydes.
C)ketone.
D)acids.
E)amides.
11

LDA (lithium diisopropylamide) is?
A)a common solvent.
B)an oxidizing reagent.
C)a reducing agent.
D)a strong acid.
E)a strong base.





To learn more about the book this website supports, please visit its Information Center.
(c)2006 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.


Organic ChemistryOnline Learning Center

Home > Chapter 21 > Practice Problems