Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 12, Problem LGP
The problem below is directed toward devising a hypothetical pathway for the synthesis of the acyclic central portion of Crixivan (Merck and Company’s HIV protease inhibitor). Note that your synthesis might not adequately control the stereochemistry during each step, but for this particular exercise chat is not expected.
Fill in missing compounds and reagents in the following outline of a hypothetical synthesis of the acyclic central portion of Crixivan. Note that more than one intermediate compound may be involved between some of the structures shown below.
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The following sequence, beginning with a cyclic hemiacetal (compound A), was part of a recently reported enantiospecific synthesis of a powerful sex pheromone (currently used in pest management) of the mealybug Pseudococcus viburni:
Draw the structures of compound B and C. Provide a plausible mechanism to explain the transformation from compound C into compound D. Identify the reagents you would need to convert compound D into compound F (in just two steps). Also identify the structure of compound E.
Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Draw all the oissuvke resonance forms of methoxybenzene, including the hybrid Based on the structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.
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Chapter 12 Solutions
Organic Chemistry
Ch. 12 - Prob. 1PPCh. 12 - Prob. 2PPCh. 12 - Prob. 3PPCh. 12 - PRACTICE PROBLEM 12.4 Predict the products of the...Ch. 12 - Prob. 5PPCh. 12 - Prob. 6PPCh. 12 - Practice Problem 12.7
Provide retrosynthetic...Ch. 12 - Prob. 8PPCh. 12 - What products would you expect from the reaction...Ch. 12 - What products would you expect from the reaction...
Ch. 12 - What product (or products) would be formed from...Ch. 12 - Prob. 12PCh. 12 - 12.13 Write reaction conditions and the product...Ch. 12 - Prob. 14PCh. 12 - Predict the organic product from each of the...Ch. 12 - Predict the organic product from each of the...Ch. 12 - Predict the organic product from each of the...Ch. 12 - Predict the major organic product from each of the...Ch. 12 - Synthesize each of the following compounds from...Ch. 12 - Prob. 20PCh. 12 - 21. Write a mechanism for the following reaction....Ch. 12 - Prob. 22PCh. 12 - 23. What organic products A-H would you expect...Ch. 12 - Prob. 24PCh. 12 - Show how 1-pentanol could be transformed into each...Ch. 12 - Provide the reagents needed to accomplish...Ch. 12 - Prob. 27PCh. 12 - For each of the following alcohols, write a...Ch. 12 - Prob. 29PCh. 12 - Prob. 30PCh. 12 - Prob. 31PCh. 12 - Prob. 32PCh. 12 - Predict the major organic product from each of the...Ch. 12 - 34. Synthesize the following compound using...Ch. 12 - Prob. 35PCh. 12 - Prob. 36PCh. 12 - 37. Explain how and IR spectroscopy could be used...Ch. 12 - 38. An unknown X shows a broad absorption band in...Ch. 12 - Prob. 39PCh. 12 - The problem below is directed toward devising a...
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