Reaction of α-chloro-α-phenylselenoesters with silyl enol ethers. Synthesis of α-phenylseleno-γ-keto esters and γ-butyrolactones

Article abstract of DOI:10.1016/S0040-4039(96)02151-X

Silyl enol ethers of ketones are alkylated with ethyl α-chloro-α-phenylseleno acetate 1a or with ethyl α-chloro-α-phenylseleno propionate 1b, mediated by zinc bromide to give the corresponding α-phenylseleno-γ-keto esters 3 in moderate to good yields.