ethyl 4-(benzylamino)butanoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Analogously to Example 1, by using equivalent quantities, reacting N-(p-chlorobenzoyl)-L-methionine and ethyl 4-benzylaminobutyrate and suitable processing, dissolving the evaporation residue in ethanol, adding an ethanolic solution of potassium hydroxide, stirring for 12 hours at room temperature and further processing yields N-[N-(p-chlorobenzoyl)-L-methionyl]-4-benzylaminobutyric acid.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Analogously to Example 1, by using equivalent quantities, reacting N-(p-chlorobenzoyl)-6-(1-phenylethylamino)caproic acid and ethyl 4-benzylaminobutyrate and suitable processing, dissolving the evaporation residue in ethanol, adding an ethanolic solution of potassium hydroxide, stirring for 12 hours at room temperature and further processing yields N-[N-(p-chlorobenzoyl)-6-(1-phenylethylamino)hexanoyl]-4-benzylaminobutyric acid.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Analogously to Example 1, by using equivalent quantities, reacting N-(p-chlorobenzoyl)-4-(1-phenylethylamino)butyric acid and ethyl 4-benzylaminobutyrate and suitable processing, dissolving the evaporation residue in ethanol, adding an ethanolic solution of potassium hydroxide, stirring for 12 hours at room temperature and further processing yields N-[N-(p-chorobenzoyl)-4-(1-phenylethylamino)butyryl]-4-benzylaminobutyric acid.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Analogously to Example 1, by using equivalent quantities, reacting N-propionyl-4-(2,6-dimethylanilino)butyric acid and ethyl 4-(benzylamino)butyrate and suitable processing produces ethyl N-[N-propionyl-4-(2,6-dimethylanilino)butyryl]-4-(benzylamino)butyrate (oil), saponification of which and processing of the reaction product yields N-[N-propionyl-4-(2,6-dimethylanilino)butyryl]-4-(benzylamino)butyric acid (oil).