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I have been asked to determine the major product for the reaction: enter image description here

From the reagent given, one can tell that this is an epoxidation reaction. But, as only one mole of the peroxyacid is given, epoxidation can only take place in one of the two bonds.

How do you determine on which double bond the epoxidation will take place?

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    $\begingroup$ It should be one equivalent, not one mole. $\endgroup$ Commented Apr 17, 2021 at 16:11

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MCPBA preferentially reacts at the more electron-rich alkene, in this case the more substituted alkene according to this entry on chemistryportal.net here and this review RSC Advances

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