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Organic Chemistry Practice Problem Set for Test #4 - Whittier College, Spring 2004, Exams of Organic Chemistry

A practice problem set for test #4 in organic chemistry chem 231b at whittier college, spring 2004. The problem set includes various organic chemistry reactions and transformations, requiring students to predict major products, identify reagents, and answer other related questions. Some questions may require drawing reaction mechanisms and ranking molecules in order of basicity.

Typology: Exams

Pre 2010

Uploaded on 08/19/2009

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Organic Chemistry: CHEM 231B
Whittier College
Spring 2004
Practice Problem Set for Test #4
1. Predict the major product(s) for the following reactions:
O
Cl
AlCl3
O
HN
O
O
H
O
O
HOOH
O
NH
?
1. HNO3 / H2SO4
2. NH2-NH2 / NaOH / H2O?
1. LDA / THF (reverse addition)
2. 3-methyl-butanal / THF?
(1 eq)
1.
Catalytic H2SO4 / 0 C
2. EtMgBr / Et2O
3. 0.1 M HCl
4. Acidic Azeotropic removal of water
(Benzene / pTSOH / Dean Stark Trap)
?
1.H2SO4 / Benzene / Azeotrope
2. Isobutyl bromide / THF
3. 0.1 M HCl?
O
NaOCH3 / CH3OH / 2,2-dimethylethanal?
1a. What are the identities of all of the major products?
1b. Understanding reaction mechanisms is important for this test. As a result, you might want to draw all of
the mechanisms for the reactions.
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Organic Chemistry: CHEM 231B

Whittier College

Spring 2004

Practice Problem Set for Test

1. Predict the major product(s) for the following reactions :

O

Cl

AlCl 3

O

HN

O

O

H

O

O

HO

OH

O

NH

?

1. HNO 3 / H 2 SO 4
  1. NH 2 -NH 2 / NaOH / H 2 O ?
  2. LDA / THF (reverse addition)
  3. 3-methyl-butanal / THF ? 1.^ (1 eq)

Catalytic H 2 SO 4 / 0 C

  1. EtMgBr / Et 2 O
  2. 0.1 M HCl
  3. Acidic Azeotropic removal of water (Benzene / pTSOH / Dean Stark Trap)

?

H 2 SO 4 / Benzene / Azeotrope

  1. Isobutyl bromide / THF
  2. 0.1 M HCl

?

O

NaOCH 3 / CH 3 OH / 2,2-dimethylethanal

?

1a. What are the identities of all of the major products?

1b. Understanding reaction mechanisms is important for this test. As a result, you might want to draw all of

the mechanisms for the reactions.

2. Provide the required reagents for the following transformations. More than one synthetic step may be

required.

NO 2

Cl

Br

NH

O

O

O

OH O

OH

OH

3. Do question 50 from chapter 16.