Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 5, Problem 3LGP
Interpretation Introduction
Interpretation:
All the chiral centers in cortisone are to be identified and the appropriate
Concept introduction:
Each center is analyzed separately if the compound contains more than one chirality center.
The designation of each carbon is determined by using the numbers.
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Coibacin B (shown below) is a natural product that exhibits potent anti-inflammatory activity and potential activity in the treatment of leishmaniasis, a disease caused by certain
parasites
(Org. Lett. 2012, 14, 3878-3881):
(a) Assign the configuration (R or S) of each chirality center (labeled A to C) in coibacin B.
(b) Identify the number of possible stereoisomers for this compound, assuming that the geometry of the alkenes are fixed. Choices are given below and write the CAPITAL
LETTER of your choice.
A. 2
В. 4
С. 8
D.
16
ANSWERS:
(a) A.
В.
C.
(b)
(a) assign R or S configuration to each chiral center,
(b) Which compound are enantiomers?
(c) Which compounds are diastereomers?
5:51
Draw examples of the following:
(a) A meso compound with the formula C8H18
(b) A meso compound with the formula C9H20
(c) A compound with two chirality centers, one R and the other S
Chapter 5 Solutions
Organic Chemistry
Ch. 5 - Prob. 1PPCh. 5 - Prob. 2PPCh. 5 - Prob. 3PPCh. 5 - Prob. 4PPCh. 5 - Prob. 5PPCh. 5 - Prob. 6PPCh. 5 - Prob. 7PPCh. 5 - Practice Problem 5.8 Write three-dimensional...Ch. 5 - Prob. 9PPCh. 5 - Prob. 10PP
Ch. 5 - Practice Problem 5.11 List the substituents in...Ch. 5 - Prob. 12PPCh. 5 - Practice Problem 5.13 Tell whether the two...Ch. 5 - Prob. 14PPCh. 5 - Prob. 15PPCh. 5 - Prob. 16PPCh. 5 - Prob. 17PPCh. 5 - Prob. 18PPCh. 5 - Prob. 19PPCh. 5 - Prob. 20PPCh. 5 - Practice Problem 5.21 The following are formulas...Ch. 5 - Practice Problem 5.22 Write three-dimensional...Ch. 5 - Prob. 23PPCh. 5 - Practice Problem 5.24 Give names chat include (R)...Ch. 5 - Prob. 25PPCh. 5 - Prob. 26PPCh. 5 - Prob. 27PPCh. 5 - Prob. 28PPCh. 5 - Practice Problem 5.29 Write formulas for all of...Ch. 5 - Prob. 30PPCh. 5 - Prob. 31PPCh. 5 - Prob. 32PPCh. 5 - Prob. 33PCh. 5 - Prob. 34PCh. 5 - 5.35 Designate the (R) or (S) configuration at...Ch. 5 - Prob. 36PCh. 5 - (a) Write the structure of...Ch. 5 - Shown below are Newman projection formulas for...Ch. 5 - 5.39 Write appropriate structural formulas...Ch. 5 - Discuss whether each of the following compounds...Ch. 5 - Prob. 42PCh. 5 - Prob. 43PCh. 5 - Compound F has the molecular formula C5H8 and is...Ch. 5 - Prob. 45PCh. 5 - Prob. 46PCh. 5 - Prob. 47PCh. 5 - For the following molecule, draw its enantiomer as...Ch. 5 - 5.49 (Use models to solve this...Ch. 5 - 5.50 (Use models to solve this...Ch. 5 - (Use models co solve this problem.) Write...Ch. 5 - 5.52 Tartaric acid was an important compound in...Ch. 5 - Prob. 53PCh. 5 - Prob. 54PCh. 5 - Prob. 55PCh. 5 - Prob. 1LGPCh. 5 - Prob. 2LGPCh. 5 - Prob. 3LGP
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- (A) How many chirality centers does the following molecule contain? (B) How many stereoisomers are possible for this molecule? (C) Assign R,S designation to each chiral carbonarrow_forwardCalculate the degree of unsaturation in each of the following formulas (a) Cholesterol, C27H46o (b) DDT, C14HgC15 (c) Prostaglandin E1, C2oH3405 (d) Caffeine, C8H10N402 (e) Cortisone, C21H28O5 (f) Atropine, C17H23NO3arrow_forward(a) Draw a skeletal structure of the anabolic steroid methenolone from the following description. Methenolone contains the tetracyclic steroid skeleton with a carbonyl group at C3, a hydroxyl at C17, a double bond between C1 and C2, and methyl groups bonded to C1, C10, and C13. (b) Add wedges and dashed wedges for all stereogenic centers with thefollowing information: the configuration at C10 is R, the configuration at C13 is S, the configuration at C17 is S, and all substituents at ring fusions are trans to each other. (c) Draw the structure of Primobolan, the product formed when methenolone is treated with CH3(CH2)5COCl and pyridine. Primobolan is an anabolic steroid that can be taken orally or by injection and has been used illegally by well-known Major League Baseball players.arrow_forward
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- Below are drawn the different chair conformations of the methyl glycoside of galactose. но он но он оМе OMe но- в A OH он (ii) Give the correct full name of compound A (= B) (ii) The name of the compound does not contain information on conformation (only configuration). Give the accepted conformational description for compound A and for compound B. (iv) Draw the Fischer projections of the open form of the corresponding reducing sugars of compound A (= B).arrow_forward31. Which of the following statements about cholesterol is not correct? CH. HO Cholesterol 16 (a) Cholesterol is a steroid that contains a tetracyclic ring system. (b) Cholesterol is a steroid that contains 8 chiral carbons and can form 28 or 256 stereoisomers. (c) Each atom or group attached to a ring-junction carbon (i.e., carbons a-e) is in a trans or axial position. Because of this the tetracyclic ring system is mostly flat. (d) Cholesterol is used to synthesized vitamin D, bile acids, sex hormones, and adrenocorticoid hormones. (e) Cholesterol is not found in the cell membranes of animals.arrow_forwardOne source defines a meso compound as “an achiral compound with stereocenters.” Why is this a poor definition?arrow_forward
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