Highly Stereoselective (3+2) Cycloadditions of Levoglucosenone (LGO) with the In Situ-Generated Thiocarbonyl S -Methanides (Thiocarbonyl Ylides) Derived from Aromatic and Cycloaliphatic Thioketones †. - Mlostoń, Grzegorz; Celeda, Małgorzata; Palusiak, Marcin; Heimgartner, Heinz; Witczak, Zbigniew J. (Molecules, 2026)