I2-induced enoletherification of α-allyl substituted β-keto sulfones ; a route to 3-phenylsulfonyl-2,5-disusbstituted furans

Iodine-induced enoletherification of α-allyl substituted β-keto sulfones leads to 4,5-dihydro-5-iodomethylfurans which are readily converted to 3-phenylsulfonyl-2,5-disubstituted furans