“…Optically active dithiophosphoric or aryldithiophosphonic acids were prepared when (1S)‐ endo ‐(–)‐borneol was involved in reactions with tetraphosphorus decasulfide or 2,4‐diaryl 1,3,2,4‐dithiadiphosphetane‐2,4‐disulfides . Taking into account our preliminary communication as an abstract of conference report , in this article, experimental details of optically active S‐esters of dithiophosphoric acid are presented on the basis of (1S)‐ endo ‐(–)‐borneol.…”