4.4 Assign R or S configuration to each chirality center in the following molecules, Identify which pairs are enantiomers or diastereomers (a) Br (b) CH3 (c) CH3 H CH3 H Br Br H3C H OH CH3 H OH HO, CH3 OH ---
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- Consider the following six compounds (A–F). How are the two compounds in each pair related? Choose from enantiomers, epimers, diastereomers but not epimers, constitutional isomers, and identical compounds.a. A and Bb. A and Cc. B and Cd. A and De. E and FHypoglycin A, an amino acid derivative found in unripened lychee, is a compound that is acutely toxic and can lead to death when ingested in large amounts by undernourished children. Draw all possible stereoisomers for hypoglycin A, and give the R,S designation for each stereogenic center.Part B. Mark each chirality center in each molecule with an asterisk (*).
- Consider the ball-and-stick models A–D. How is each pair of compounds related: (a) A and B; (b) A and C; (c) A and D; (d) C and D? Choose from identical molecules, enantiomers, or diastereomers.Draw the 2 chair conformers of the enantiomer of Compound XI.Trabectedin, shown in a ball-and-stick model on the cover of this text, is an anticancer drug sold under the trade name Yondelis. a. Locate the stereogenic centers in trabectedin. b.What is the maximum number of stereoisomers possible for trabectedin? c.Draw the enantiomer. d.Draw a diastereomer. e.If the specific rotation of trabectedin is +41.5, what is the [α] of a solution that contains 75% trabectedin and 25% of its enantiomer?f . What is the ee of a solution with [α] = +10.5?
- Citalopram is an antidepressant pharmaceutical that is sold as a racemic mixture. However, it is known that the (S) enantiomer is 30x more biologically active than the (R) enantiomer. Draw the (S) configuration.Draw all possible configurational stereoisomers for the given molecule below. Designate the R/S on the stereogenic centers and E/Z on the C=CPart B. Mark each chirality center in each molecule with an asterisk (*). Illustrate onto the image Cannot be hand-drawn
- Exemestane (trade name Aromasin) is a drug used to treat breast cancer. Locate the stereogenic centers in exemestane and draw the enantiomer.Determine the configuration of each stereogenic center in the compound below. Highlight the carbon in red if the configuration is R, and in blue if the configuration is S.Saquinavir (trade name Invirase) is a protease inhibitor, used to treat HIV (human immunodeficiency virus). a.Locate all stereogenic centers in saquinavir, and label each stereogenic center as R or S. b.Draw the enantiomer of saquinavir. c.Draw a diastereomer of saquinavir. d.Draw a constitutional isomer that contains at least one different functional group.