Free radical additions of hydrogen donor solvents to tert-butyl perpent-4-enoate have given 4-substituted γ-butyrolactones, with yields of 50% or greater. Such reactions applied to allyl- tert-butyl peroxide have produced 2, 3-epoxypropanation of these solvents. Similar addition- elimination processes occurred with tert-butyl 4-methyl-perpent-4-enoate, tert-butyl 2, 2- dimethyl-perpent-4-enoate and tert-butyl-methallyl peroxide, but they failed with tert-butyl ...
