“…The 2-iodomethyl-3,5,6,7-tetrahydrobenzofuran-4-ones have also been recently prepared by polymer-supported selenium-induced electrophilic cyclization of allyl substituted 1,3-dicarbonyl compounds followed by cleavage of the selenium linkers using CH 3 I/NaI in DMF [ 24 ]. In another development, Ferraz and coworkers applied I 2 –NaHCO 3 mixture in dichloromethane at room temperature to series of α-alkenyl β-keto esters and γ-alkenyl β-keto esters bearing mono or disubstituted double bond to afford variously substituted iodocyclic ethers [ 54 ] Among the systems employed as substrates were the 2-allyl-1,3-cyclohexanedione derivatives 70 , which afforded 2-iodomethyl-3,5,6,7-tetrahydrobenzofuran-4-ones 71 in high yield ( Scheme 27 ) [ 54 ].…”