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This is the answer to chapter 24, problem number 15 from the smith organic chemistry textbook.
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This problem asks us what beta keto ester is formed when each ester is used in a clazin reaction.
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Okay.
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And so one way to help visualize this, if you're having trouble at all, is to just draw two equivalents of each of the starting.
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Esters, and then draw a new bond forming from the alpha carbon of one to the carbonyl of the other.
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And then even though there are some steps in between in the stepwise mechanism, think about the ester leaving, so the oxygen of the ester leaving.
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And so when you do it that way, it's somewhat easier to visualize.
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And so our product here for a is going to look like this.
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Okay.
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And so that's a...