| 摘要 |
<p>A process for preparing alpha-L-aspartyl-L-phenylalanine alkyl esters from L-aspartic acid, of which the amino group is protected by bonding it to a 3,5-dimethoxy- alpha , alpha -dimethyl-benzyloxycarbonyl group, then transforming this intermediate into the corresponding anhydride by means of a dehydrating agent, then reacting the anhydride with L-phenylalanine alkyl ester, and finally eliminating the protective group by the action of U.V. radiation.</p> |
