Atropisomeric Sulfur-compounds In Organic-synthesis - Generation and Reactions of the Carbanions of Dinaphtho[2,1-d-1',2'-f][1,3]dithiepine and Its Oxides

Oxidation of dinaphtho[2,1-d:1′,2′-f][1,3]dithiepine (2) gives a single diastereoisomeric sulphoxide (1) which reacts diastereospecifically with electrophiles at variance with the unoxidized substrate (2) and other combinations of oxides (4),(6), and (7) which afford diastereoisomeric mixtures of products