methyl 2-(4-aminophenyl)propanoate

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

Procedure: Following the same procedure described for (S)-methyl 2-[4-(carbamothioylamino)phenyl]propanoate and starting from methyl 2-(4-aminophenyl)propanoate (98 mmol) and sodium cyanate (128 mmol), after workup methyl 2-[4-(carbamoylamino)phenyl]propanoate was isolated as white solid (65%). 1H-NMR (CDCl3): δ 8.90 (bs, 1H, CONH), 7.55 (d, 2H, J=7 Hz), 7.20 (d, 2H, J=7 Hz), 6.50 (bs, 2H, CONH2), 3.75 (m, 1H), 3.60 (s, 3H), 1.50 (d, 3H, J=7 Hz).

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

Procedure: Following the same procedure described for (S)-methyl 2-[4-(carbamothioylamino)phenyl]propanoate and starting from methyl 2-(4-aminophenyl)propanoate (98 mmol), after workup methyl 2-[4-(carbamoylamino)phenyl]propanoate was isolated as white solid (74%). 1H-NMR (CDCl3): δ 8.25 (bs, 1H, CSNH), 7.40 (d, 2H, J=7 Hz), 7.20 (d, 2H, J=7 Hz), 6.20 (bs, 2H, CSNH2), 3.75 (m, 1H), 3.65 (s, 3H), 1.50 (d, 3H, J=7 Hz).

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

Procedure: Following the same procedure described for (S)-methyl 2-[4-(carbamothioylamino)phenyl]propanoate and starting from methyl 2-(4-aminophenyl)propanoate (98 mmol), after workup methyl 2-[4-(carbamoylamino)phenyl]propanoate was isolated as white solid (74%). 1H-NMR (CDCl3): δ 8.25 (bs, 1H, CSNH), 7.40 (d, 2H, J=7 Hz), 7.20 (d, 2H, J=7 Hz), 6.20 (bs, 2H, CSNH2), 3.75 (m, 1H), 3.65 (s, 3H), 1.50 (d, 3H, J=7 Hz).

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

Procedure: 1-(2-Methoxy-5-methyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline-7-carboxylic acid was converted to the title compound in analogy to example 8, steps 3 and 4. Step 3 was performed using 2-(4-amino-phenyl)-propionic acid methyl ester and 1-(2-methoxy-5-methyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline-7-carboxylic acid and yielded 2-(4-{[1-(2-methoxy-5-methyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline-7-carbonyl]-amino}-phenyl)-propionic acid methyl ester, which was hydrolyzed to 2-(4-{[1-(2-methoxy-5-methyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline-7-carbonyl]-amino}-phenyl)-propionic acid in step 4, MS (ISP): m/e=526.2 (M−H).

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

Procedure: Following the procedure of Himmelsbach, et. al., EP 0587134, Example V, glycolaldehyde dimer (Aldrich) (1 mmol) is added to a solution of methyl 2-(4-aminophenyl)propionate (1 mmol) in aqueous CH3CN (pH 6-7) (10 mL), followed by NaBH3CN (1.2 mmol), and the mixture is allowed to stir for 1 h. The mixture concentrated to an oil, and the residue is dissolved in a mixture of ice water and EtOAc. The aqueous layer is neutralized with 4N NaOH and washed with EtOAc. The organic phase is concentrated to an oil. A solution of the oil in EtOAc is chromatographed (silica gel, gradient, 5-30% CH3OH/CH2Cl2 -0.1% HOAc). The fractions containing the product are combined and concentrated to give the title compound. The mixture concentrated to an oil the residue is dissolved in a mixture of ice water and EtOAc washed with EtOAc The organic phase is concentrated to an oil A solution of the oil in EtOAc is chromatographed (silica gel, gradient, 5-30% CH3OH/CH2Cl2 -0.1% HOAc) The fractions containing the product concentrated

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

Procedure: Following the same procedure described for (S)-methyl 2-[4-(carbamothioylamino)phenyl]propanoate and starting from methyl 2-(4-aminophenyl)propanoate (98 mmol) and sodium cyanate (128 mmol), after workup methyl 2-[4-(carbamoylamino)phenyl]propanoate was isolated as white solid (65%). 1H-NMR (CDCl3): δ 8.90 (bs, 1H, CONH), 7.55 (d, 2H, J=7 Hz), 7.20 (d, 2H, J=7 Hz), 6.50 (bs, 2H, CONH2), 3.75 (m, 1H), 3.60 (s, 3H), 1.50 (d, 3H, J=7 Hz).

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

Procedure: Following the same procedure described for (S)-methyl 2-[4-(carbamothioylamino)phenyl]propanoate and starting from methyl 2-(4-aminophenyl)propanoate (98 mmol), after workup methyl 2-[4-(carbamoylamino)phenyl]propanoate was isolated as white solid (74%). 1H-NMR (CDCl3): δ 8.25 (bs, 1H, CSNH), 7.40 (d, 2H, J=7 Hz), 7.20 (d, 2H, J=7 Hz), 6.20 (bs, 2H, CSNH2), 3.75 (m, 1H), 3.65 (s, 3H), 1.50 (d, 3H, J=7 Hz).