Exam3-2008 key

Exam3-2008 key - CHEMISTRY 2261 EXAM 3 October 29, 2008...

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CHEMISTRY 2261 October 29, 2008 EXAM 3 NAME (PRINT)____________________________________________ 123456789 1 0 1 1 TOTAL ANSWER KE Y LIST number 1. (12 pts, 4 pts ea) Give the major product(s) (indicating stereochemistry where appropriate) of each of the following reactions. a) b) c) Cl 2 H 2 O 1. BH 3 2. HOOH, NaOH HBr peroxide HO Cl H Br H Br mixture H OH syn addition anti addition not stereoselective HO Cl H OH or any way which indicates both syn and anti products 2. (6 pts) Draw all stereoisomers for the following structures. (b) (a) Me Me Me Me CN CN NC Me Me Me Me Me Me Me Me Me Me Me Me CN CN NC CN CN NC Me Me Me Me or or
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2 3. (8 pts, 4 pts ea) Provide the required diene and dienophile for each of the following Diels-Alder reactions. b) a) H H O 2 N OMe N O O Me N O O Me OMe NO 2 4. (8 pts) Choose (circle) the major isomer produced in the following Diels-Alder reaction. OMe CN Me Δ OMe CN Me OMe CN Me OMe Me CN OMe Me CN OMe CN Me OMe CN Me OMe Me CN OMe Me CN OMe CN Me OMe CN Me OMe Me CN OMe Me CN OMe CN Me OMe CN Me OMe Me CN OMe Me CN trans wrong regiochem wrong regiochem
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Exam3-2008 key - CHEMISTRY 2261 EXAM 3 October 29, 2008...

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