Hydroximate has proved to be a potential functionalgroup by realizing the radical cyclization of the dienes connected with the hydroximates 4 and 10 followed by conversion of the resulting cyclic hydroximates 5, 6, 11, and 12 to lactones 13 and 14.
Radical Cyclization in Heterocycle Synthesis. 11.<sup>1</sup> A Novel Synthesis of α,β-Disubstituted γ-Lactones via Sulfanyl Radical Addition−Cyclization Using Hydroximates as a Tether
of sulfanyl radical addition-cyclization of dienes connected with hydroximates and subsequent conversion of the resulting cyclic hydroximate to the lactones provides a novel method for the construction of alpha,beta-disubstituted gamma-lactones. Upon treatment with thiophenol in the presence of AIBN, dienes connected with hydroximates smoothly underwent sulfanyl radical addition-cyclization to give