Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Question
Chapter 24, Problem 24.19P
Interpretation Introduction
Interpretation:
Product of the given allylic alkylation reaction has to be written.
Concept Introduction:
In catalytic allylic alkylation, a nucleophile, enolate of a doubly activated
Stereochemistry at the alkylation carbon is retained.
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Diphenylacetylene can be synthesized by the double dehydrohalogenation of 1,2-dibromo-1,2-diphenylethene. The sequence starting from (E)-1,2-diphenylethene consists of bromination to give the dibromide, followed by dehydrohalogenation to give a vinylic bromide, then a second dehydrohalogenation to give diphenylacetylene.(a) What is the structure, including stereochemistry, of the vinylic bromide?(b) If the sequence starts with (Z)-1,2-dibromo-1,2-diphenylethene, what is (are) the structure(s) of the intermediate dibromide(s)? What is the structure of the vinylic bromide?
Complete the following reactions, clearly indicating regio-and stereochemistry where applicable. In cases, where ortho-and para-products are formed, draw both.
Predict the major products of the following reaction. If it is possible, write all stereoisomers.
Chapter 24 Solutions
Organic Chemistry
Ch. 24.3 - Prob. 24.1PCh. 24.3 - Prob. 24.2PCh. 24.4 - Prob. 24.3PCh. 24.5 - Show how the following compound can be prepared...Ch. 24.5 - Prob. 24.5PCh. 24.5 - Prob. 24.6PCh. 24.6 - Prob. 24.7PCh. 24 - Prob. 24.8PCh. 24 - Prob. 24.9PCh. 24 - Prob. 24.10P
Ch. 24 - Treatment of cyclohexene with iodobenzene under...Ch. 24 - Prob. 24.12PCh. 24 - Prob. 24.13PCh. 24 - The aryl diene undergoes sequential Heck reactions...Ch. 24 - Heck reactions take place with alkynes as well as...Ch. 24 - Prob. 24.16PCh. 24 - The following transformation involves a series of...Ch. 24 - Show the sequence of Heck reactions by which the...Ch. 24 - Prob. 24.19PCh. 24 - Write the steps that are critical in the following...Ch. 24 - Prob. 24.21PCh. 24 - Prob. 24.22PCh. 24 - Prob. 24.23PCh. 24 - Show how the following compound could be prepared...Ch. 24 - It is typically very difficult to do a...Ch. 24 - The compound eutypine is an antibacterial agent...Ch. 24 - Prob. 24.27PCh. 24 - Prob. 24.28PCh. 24 - Prob. 24.29PCh. 24 - Prob. 24.30PCh. 24 - Prob. 24.31PCh. 24 - Prob. 24.32PCh. 24 - Prob. 24.33PCh. 24 - The following transformation can be accomplished...Ch. 24 - Prob. 24.35PCh. 24 - Prob. 24.36PCh. 24 - Prob. 24.37PCh. 24 - Prob. 24.38PCh. 24 - E. J. Coreys 1964 total synthesis of...Ch. 24 - Prob. 24.40P
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