Imide, Verfahren zu ihrer Herstellung und ihre Anwendung in einem Verfahren zur Herstellung von Dipeptiden

摘要

An imide of the formula: where R1 is hydrogen or C1-4 alkyl, a process for the production of the compounds of formula 1 from beta -aspartylphenylalanine derivatives, and the use of the compounds of formula 1 in a process for the production of alpha -aspartylphenylalanine derivatives.