Montmorillonite-mediated hetero-Diels–Alder reaction of alkenes and o-quinomethanes generated in situ by dehydration of o-hydroxybenzyl alcohols

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Kazuhiro Chiba, Tetsuya Hirano, Yoshikazu Kitano and Masahiro Tada


Abstract

The intermolecular hetero-Diels–Alder reaction of in situ-generated o-quinomethanes and unactivated alkenes has been accomplished through a wet montmorillonite catalyst in a LiClO4–MeNO2 solution to give good yields of varied chromane skeletons.


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