The present manuscript deals with the effectiveness of mineral, LiNTf2 supported and ionic
liquid, 3-methyl-1-octyl-imidazolium tetrachloroaluminate mediated Diels-Alder reactions of isoprene
with maleic acid and 2-cyclohexene-1-one in conventional and microwave techniques. The Diels-
Alder reactions of isoprene with maleic acid and 2-cyclohexene-1-one proceeded efficiently and
smoothly in the presence of the minerals to provide the Diels-Alder adduct in moderate to excellent
yields at various reaction conditions. A promising advantage of this green method is that the entire
ionic liquid/LiNTf2 system can be recovered and reprocessed up to five runs without an appreciable
loss of activity. The solid support LiNTf2 possesses commanding mechanical features that increased
the catalytic efficiency in polar ionic liquid.
Keywords: Isoprene, maleic acid, 2-cyclohexene-1-one, diels-alder reaction, ionic liquid, LiNTf2,
microwave, solid supports.
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