When furan and maleimide undergo a DielsAlder reaction at 25 C, the major product is the endo

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When furan and maleimide undergo a Diels–Alder reaction at 25 °C, the major product is the endo adduct G. When the reaction is carried out at 90 °C, however, the major product is the exo isomer H. The endo adduct isomerizes to the exo adduct when it is heated to 90 °C. Propose an explanation that will account for these results.

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Organic Chemistry

ISBN: 978-1118133576

11th edition

Authors: Graham Solomons, Craig Fryhle, Scott Snyder

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