0244Pb21an-10.cwk (WP)

0244Pb21an-10.cwk (WP) - Moreover there are the proper...

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Answers to Problem 21, Chemistry 0244, 2010 Another problem-solving clue: whenever you see a cyclobutene and heat, THE RING IS GOING TO OPEN! Thermal opening of the cyclobutene must be conrotatory, so the structures of X and Y follow: Ph Ph 1. heat 1. heat Ph Ph X Y Ph Ph Ph Ph con-R con-R Now, because of the presence of maleic anhydride a Diels-Alder reaction is almost certain.
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Unformatted text preview: Moreover there are the proper component parts - a diene and a dienophile. Straightforward one-step reactions lead to the products. X Y O O O O O O Ph Ph O O O Ph Ph heat heat H H H H Ph Ph Ph Ph O O O...
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This note was uploaded on 03/02/2010 for the course CHEM orgo taught by Professor Jones during the Spring '10 term at NYU.

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