Abstract
ZrO 2-pillared clay (Zr-PILC) a mild recyclable solid Lewis acid catalyst prepared by a short and simple novel method by us, has been used for the selective, monotetrahydropyranylation under solvent-free condition both by heating and microwave irradiation of 1,n-symmetrical diols and simple alcohols with good selectivity and conversion in high yields for the first time. HO−( CH 2) n− OH+ DHP → MW Zr-PILC HO−( CH 2) n− OTHP A comparative study with previously reported methods and other acid catalysts has been done to demonstrate the efficacy of the present developed methodology.
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