... Download full text in PDF. Tetrahedron Letters,Vol.26,No.50,pn 6143-6146,1985 0040-4039/85 ~3.00 + .00 Printed in ... RSR % Yield (time at It 81) UI Salt thiane (L~) 84 (20 hr) ~a ~ 242-50 (d) benzyl ... 2 g dry silica gel (Baker 60-200 M), fol- lowed by an equal volume of ...