Organic Chemistry
Organic Chemistry
11th Edition
ISBN: 9781118133576
Author: T. W. Graham Solomons, Craig Fryhle
Publisher: Wiley, John & Sons, Incorporated
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Chapter 15, Problem 1LGP

The structure of thyroxine, a thyroid hormone that helps to regulate metabolic rate, was determined in part by comparison with a synthetic compound believed to have the same structure as natural thyroxine. The final step in the laboratory synthesis of thyroxine by Harington and Barger, shown below, involves an electrophilic aromatic substitution. Draw a detailed mechanism for this step and explain why the iodine substitutions occur ortho to the phenolic hydroxyl and not ortho to the oxygen of the aryl ether. [One reason iodine is required in our diet (e.g., in iodized salt) is for the biosynthesis of thyroxine.]

Chapter 15, Problem 1LGP, The structure of thyroxine, a thyroid hormone that helps to regulate metabolic rate, was determined

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Chapter 15 Solutions

Organic Chemistry

Ch. 15 - PRACTICE PROBLEM 15.8 Write resonance structures...Ch. 15 - PRACTICE PROBLEM 15.9 Provide a mechanism for the...Ch. 15 - PRACTICE PROBLEM 15.13 Write mechanisms for the...Ch. 15 - Prob. 14PPCh. 15 - PRACTICE PROBLEM 15.15 Suppose you needed to...Ch. 15 - PRACTICE PROBLEM 15.16 Predict the major product...Ch. 15 - PRACTICE PROBLEM Account for the following...Ch. 15 - PRACTICE PROBLEM 1-Chloro-3-methyl-2-butene...Ch. 15 - Prob. 19PPCh. 15 - PRACTICE PROBLEM 15.20 The following chlorides (Ph...Ch. 15 - Prob. 21PPCh. 15 - Provide a detailed mechanism for each of the...Ch. 15 - 15.34 Provide a detailed mechanism for the...Ch. 15 - Prob. 24PCh. 15 - Many polycyclic aromatic compounds have been...Ch. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - Predict the major product (or products) formed...Ch. 15 - Prob. 29PCh. 15 - Prob. 30PCh. 15 - Predict the major products of the following...Ch. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Starting with aniline, outline a synthesis of each...Ch. 15 - Prob. 36PCh. 15 - 15.37 Propose structures for compounds G–I: Ch. 15 - 2,6-Dichlorophenol has been isolated from the...Ch. 15 - 2-Methylnaphthalene can be synthesized from...Ch. 15 - Show how you might synthesize each of the...Ch. 15 - Prob. 41PCh. 15 - Prob. 42PCh. 15 - 15.47 Provide structures for compounds A and B: Ch. 15 - Prob. 44PCh. 15 - Prob. 45PCh. 15 - Treating cyclohexene with acetyl chloride and...Ch. 15 - 15.47 The tert-butyl group can be used as a...Ch. 15 - When toluene is sulfonated (concentrated H2SO4) at...Ch. 15 - Prob. 49PCh. 15 - 15.50 Heating 1,1,1-triphenylmethanol with ethanol...Ch. 15 - 15.51 (a) Which of the following halides would you...Ch. 15 - Furan undergoes electrophilic aromatic...Ch. 15 - 15.61 Acetanilide was subjected to the following...Ch. 15 - Prob. 54PCh. 15 - When compound C, which is often used to model a...Ch. 15 - The structure of thyroxine, a thyroid hormone that...Ch. 15 - Prob. 2LGPCh. 15 - 3. Deduce the structures of compounds E–L in the...Ch. 15 - Which of the following compounds would be most...Ch. 15 - 15.2 Which of the following is not a...Ch. 15 - Prob. 3QCh. 15 - Complete the following syntheses.
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