Synthesis of (2S,3S)-3-Amino-2-phenylthietane.-With a view to preparing optically active 1,3-dithiols for the asymmetric synthesis of alkaloids the reaction between the ditosylate ( I) and Et-O-CS-SK is carried out. However, the unexpected thietane (II) is formed with retention of configuration at C-2. - (ROZWADOWSKA, M. D.; Tetrahedron: Asymmetry 5 (1994) 7, 1327-1332 Fac. Chem., Mickiewicz Univ., PL-60-780 Poznan, Pol.; EN)