4-halo-dihydropyrans and the preparation thereof

Details 4-halo-dihydropyrans and the preparation thereof 4-halo-dihydropyrans and the preparation thereof

C - Chemistry, Metallurgy

07

D

260/357, 260/359

C07D 309/32 (2006.01) C07D 309/40 (2006.01)

Patent

CA 1117541

ABSTRACT The preparation 4-halo-dihydropyran intermediates by reacting (i) a substituted or unsubstituted 2H-pyran- 3(6H)-one with at least one equivalent, or (ii) a furfuryl alcohol with at least two equivalents, of a halogen-contain- ing oxidant, selected from chlorine, bromine, bromine chloride, hypochlorous acid, hypobromous acid or a mixture thereof; and novel 4-halo-dihydro-pyran intermediates.

363274

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