Piperidinium tetrathiotungstate has been found to react with a number of 1,n-dihalo compounds to afford the corresponding cyclic disulfides in good yields, under mild reaction conditions. This new methodology has been used as a key step in the synthesis of (+/-)-lipoic acid (35) and asparagusic acid (37).
Teuber, Lene; Christophersen, Carsten, Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1988, vol. 42, # 9, p. 629 - 634
作者:Teuber, Lene、Christophersen, Carsten
DOI:——
日期:——
Schotte, Arkiv foer Kemi, 1956, vol. 9, p. 361,364