Deoxythiosugar Derivatives with Furano, Pyrano, and Septano Motifs from<scp>L</scp>-Gulono-1,4-lactone and<scp>D</scp>-Glycero-<scp>D</scp>-<i>gulo</i>-heptono-1,4-lactone
opening and Michael addition; (3) epoxide ring opening and nucleophilic displacement process; and (4) double nucleophilic displacement. All of these reactions used benzyltriethylammonium tetrathiomolybdate, (BnEt3N)(2)MoS4 as the sulfur-transferreagent.