In initial experiments, we often recovered higher than theoretical mass balances of the tosylates. Careful observation revealed that an additional spot was always present on chromatographic analysis; the impurity appeared in close proximity to the desired tosylate on the TLC plate. This byproduct was present regardless of the alcohol used and could only be detected by careful, multiple development of the thin layer chromatograms. We ...
[Guo, Bo Zhang; Tripathi, Sadhana; Taylor, D. Martin; Stirling, Charles J. M. Journal of the Chemical Society, Chemical Communications, 1991 , # 7 p. 479 - 481]
