Synthesis of 12- and 13-Membered Sulfur-Containing Lactones by Homolytic Macrocyclization of Mercaptoacetic Esters with Alkynes - Demchuk, Dmitry V; Lazareva, Margarita I; Lindeman, Sergey V; Khrustalyov, Viktor N; Struchkov, Yurii T; Ismagilov, Rustem F; Troyansky, Emmanuil I; Nikishin, Gennady I (Synthesis, 1995)