摘要：

the invention concerns a method for the production of - amino - - hydroxycarbons u00e4ure derivatives of general formula (2r, 3s) - or (2s, 3r) - n - (x, y) - 2 - amino - 2 - hydroxy - 3 - phenyl propionic acid of formula i (z $f1, for example, (2r, 3s) - 3 - amino - 2 - hydroxy - 3 - phenyl propionic acid or - (2r, 3s) - n - benzoyl - 3 - amino - 2 - hydroxy - 3 - phenyl - propions u00e4uremethylester.compounds of the type i are valuable intermediate in the totalsynthese of taxolen in the treatment of various cancers are used.

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