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The inhibition efficiency of some antibiotics against mild steel corrosion was studied using weight loss and quantum chemical techniques. Values of inhibition efficiency obtained from weight loss measurements correlated strongly with theoretical values obtained through semi empirical calculations. High correlation coefficients were also obtained between inhibition efficiency of the antibiotics and some quantum chemical parameters, including frontier orbital (E (HOMO) and E (LUMO)), dipole moment, log P, TNC and LSER parameters (critical volume and dipolar-polarisability factor), which indicated that these parameters affect the inhibition efficiency of the compounds. It was also found that quantitative structure activity relation can be used to adequately predict the inhibition effectiveness of these compounds.

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The use of O‐diphenylmethyl (DPM) and the O‐(9‐fluorenyl) (Fl) trichloroacetimidates permitted efficient protection of alcohols. The compatibility of these groups with other chemical manipulations is demonstrated. Glucosylation of typical acceptors with an O‐glucopyranosyl trichloroacetimidate as donor having a DPM group at 2‐O afforded β‐glucopyranosides, thus demonstrating anchimeric assistance of the DPM group in the anomeric stereocontrol. This effect was also observed in mannopyranoside synthesis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)

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