03 - Problems

03 - Problems - Due in class on Oct 28th 2010 You are...

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Chem 112A, Fall 2010 - Problem Set 3 Due in class on Oct. 28th, 2010. You are encouraged to work in small groups for this assignment. Write your name AND your lab section on the problem set before submitting it. 1. Classify each of the following compounds as chiral or achiral . If they are chiral, assign all stereocenters in the provided drawing as ( R ) or ( S ) and draw the corresponding enantiomer. a. b. c. d. e. f. g. h. i. j. 2. Taxol is a complex natural product obtained originally from the PaciFc yew tree. It has been prescribed widely as a treatment for breast and ovarian cancers. Identify all of the stereogenic centers in this molecule and label them as ( R ) or ( S ). O O CH 3 Br O OH HO O O O CH 3 CH 3 O O OH OH OH OH Cl CH 3 Br Cl O O O OH O O O O HO O O OH NH O O
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remaining structures as chiral or achiral . Finally, assign the stereocenters in the chiral compounds as ( R ) or ( S ). a.
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03 - Problems - Due in class on Oct 28th 2010 You are...

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