“…The products formed at the 1 : 1 and 1 : 2 reagent ratios and detected by TLC, were isolated by column chromatography and identified as 2-tosyl-1,4 : 3,6-dianhydro-D-sorbitol (VI), 5-tosyl-1,4 : 3,6-dianhydro-D-sorbitol (VII), and 2,5-ditosyl-1,4 : 3,6-dianhydro-D-sorbitol (VIII). The structural assessment of monotosylates VI and VII and ditosylate VIII was performed by the coincidence of their melting points with published data [6,7]. At the above reagent ratios, along with ditosylate VIII, monotosylate VII is formed, i.e.…”