Textbook Question
What products would you expect from the following Suzuki coupling reactions?
(a)
2
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Ch. 17 - Reactions of Aromatic Compounds
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 17, Problem 29b
What products would you expect from the following Suzuki coupling reactions?
(b) 
Verified step by step guidance1
Step 1: Recognize that this is a Suzuki coupling reaction, which involves the cross-coupling of an aryl or vinyl halide (in this case, bromobenzonorbornene) with an organoboron compound (in this case, pyridylboronic ester) in the presence of a palladium catalyst and a base.
Step 2: Identify the two key components: (1) the aryl halide (bromobenzonorbornene) and (2) the organoboron compound (pyridylboronic ester). The palladium catalyst (Pd(PPh₃)₄) facilitates the coupling, and NaOH serves as the base to activate the boronic ester.
Step 3: Understand the mechanism. The reaction proceeds via oxidative addition of the aryl halide to the palladium catalyst, followed by transmetalation with the organoboron compound, and finally reductive elimination to form the new C-C bond.
Step 4: Predict the product. The bromine atom on the bromobenzonorbornene is replaced by the pyridyl group from the boronic ester, resulting in a biaryl product where the pyridyl group is directly bonded to the benzonorbornene ring.
Step 5: Verify the regioselectivity and stereochemistry. Since the reaction involves sp² hybridized carbons, the product will be planar at the site of the new bond. The pyridyl group will attach to the position where the bromine was originally located.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Suzuki Coupling Reaction
The Suzuki coupling reaction is a widely used method in organic chemistry for forming carbon-carbon bonds. It involves the reaction of an organoboron compound with a halogenated organic compound in the presence of a palladium catalyst and a base. This reaction is particularly valuable for synthesizing biaryl compounds and is favored for its mild reaction conditions and high functional group tolerance.
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Suzuki Reaction
Organoboron Compounds
Organoboron compounds, such as boronic acids and boronate esters, are key reactants in Suzuki coupling reactions. They contain a boron atom bonded to a carbon atom, which can participate in nucleophilic attack during the coupling process. The stability and reactivity of these compounds make them essential for forming diverse organic molecules, especially in pharmaceutical and materials chemistry.
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Palladium Catalysis
Palladium catalysis is crucial in facilitating the Suzuki coupling reaction. Palladium complexes, often in the form of Pd(0) or Pd(II), serve as catalysts that lower the activation energy required for the reaction to proceed. The palladium catalyst enables the oxidative addition of the halide to the palladium center, followed by transmetalation with the organoboron compound, ultimately leading to the formation of the desired product.
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Related Practice
Textbook Question
Show how you would use Suzuki reactions to synthesize these products from the indicated starting materials. You may use any additional reagents you need.
(b)
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Textbook Question
Show how you would use Suzuki reactions to synthesize these products from the indicated starting materials. You may use any additional reagents you need.
(a)
1
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Textbook Question
What substituted alkene would you use in the Heck reaction to make the following products?
(a)
(b)
Textbook Question
What products would you expect from the following reactions?
(b)
1
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Textbook Question
Propose mechanisms for the Birch reduction of benzoic acid. Show why the observed orientation of reduction is favored in each case.
10
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