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|Title:||Cyclic Dipeptides - A Stereocontrolled Synthesis of (2s,3r,6r) and (2r,3r,6r)-6-tert-butoxycarbonylamino-3-methoxycarbonyl-2-methyl-5-oxope Rhydro-1,4-thiazepine||Authors:||Corelli, Federico
A stereselective synthesis of the title compounds, starting from commercially available amino acids, is described. The absolute stereochemistry of 3a and 3b has been deduced on the basis of H-1 NMR and chemical degradation studies. The formation of only these two isomers has been rationalized in terms of molecular mechanics calculations.
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