5-fluoro-2-methyl-1,2,3,4-tetrahydroquinolin-8-amine

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

Procedure: To the mixture of 5-fluoro-2-methyl-1,2,3,4-tetrahydroquinolin-8-ylamine and 5-fluoro-2-methylquinolin-8-ylamine from the previous step (0.369 mmol) in DCM (10 mL) was added (S)-2-tert-butoxycarbonylaminopropionic acid (76.8 mg, 0.405 mmol) and HOAt (56 mg, 0.41 mmol). The mixture was cooled in an ice bath, then EDCI HCl (85 mg, 0.44 mmol) was added. The reaction mixture was stirred in the ice bath for 2 h, then diluted with DCM, washed with aqueous Na2CO3 and then water. The organic layer was dried (Na2SO4) and then concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane) affording the title compound as a colourless solid (63.6 mg, 49%, 2 steps). LCMS (Method J): RT 3.40 min [M+H]+ 352 The mixture was cooled in an ice bath washed with aqueous Na2CO3 The organic layer was dried (Na2SO4) concentrated in vacuo The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane)

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

Procedure: To the mixture of 5-fluoro-2-methyl-1,2,3,4-tetrahydroquinolin-8-ylamine and 5-fluoro-2-methylquinolin-8-ylamine from the previous step (0.369 mmol) in DCM (10 mL) was added (S)-2-tert-butoxycarbonylaminopropionic acid (76.8 mg, 0.405 mmol) and HOAt (56 mg, 0.41 mmol). The mixture was cooled in an ice bath, then EDCI HCl (85 mg, 0.44 mmol) was added. The reaction mixture was stirred in the ice bath for 2 h, then diluted with DCM, washed with aqueous Na2CO3 and then water. The organic layer was dried (Na2SO4) and then concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane) affording the title compound as a colourless solid (63.6 mg, 49%, 2 steps). LCMS (Method J): RT 3.40 min [M+H]+ 352 The mixture was cooled in an ice bath washed with aqueous Na2CO3 The organic layer was dried (Na2SO4) concentrated in vacuo The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane)

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

Procedure: A suspension of 10% Pd/C (30 mg) in a mixture of IMS (3 mL) and EtOAc (5 mL) was stirred under an atmosphere of hydrogen for 15 min before a solution of 5-fluoro-2-methyl-8-nitro-1,2-dihydroquinoline (76.8 mg, 0.369 mmol) in EtOAc (15 mL) was added. The reaction mixture was stirred at RT under a hydrogen atmosphere for 20 h. The suspension was then filtered through a pad of Celite® and the filtrate was concentrated in vacuo affording a mixture of the title compound and 5-fluoro-2-methylquinolin-8-ylamine as a purple oil. LCMS (Method J): RT 1.90 min (28%) [M+H]+ 181 and 2.26 min (42%) [M+H]+ 177 was added The suspension was then filtered through a pad of Celite® the filtrate was concentrated in vacuo affording

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

Procedure: A suspension of 10% Pd/C (30 mg) in a mixture of IMS (3 mL) and EtOAc (5 mL) was stirred under an atmosphere of hydrogen for 15 min before a solution of 5-fluoro-2-methyl-8-nitro-1,2-dihydroquinoline (76.8 mg, 0.369 mmol) in EtOAc (15 mL) was added. The reaction mixture was stirred at RT under a hydrogen atmosphere for 20 h. The suspension was then filtered through a pad of Celite® and the filtrate was concentrated in vacuo affording a mixture of the title compound and 5-fluoro-2-methylquinolin-8-ylamine as a purple oil. LCMS (Method J): RT 1.90 min (28%) [M+H]+ 181 and 2.26 min (42%) [M+H]+ 177 was added The suspension was then filtered through a pad of Celite® the filtrate was concentrated in vacuo affording

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

Procedure: To the mixture of 5-fluoro-2-methyl-1,2,3,4-tetrahydroquinolin-8-ylamine and 5-fluoro-2-methylquinolin-8-ylamine from the previous step (0.369 mmol) in DCM (10 mL) was added (S)-2-tert-butoxycarbonylaminopropionic acid (76.8 mg, 0.405 mmol) and HOAt (56 mg, 0.41 mmol). The mixture was cooled in an ice bath, then EDCI HCl (85 mg, 0.44 mmol) was added. The reaction mixture was stirred in the ice bath for 2 h, then diluted with DCM, washed with aqueous Na2CO3 and then water. The organic layer was dried (Na2SO4) and then concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane) affording the title compound as a colourless solid (63.6 mg, 49%, 2 steps). LCMS (Method J): RT 3.40 min [M+H]+ 352 The mixture was cooled in an ice bath washed with aqueous Na2CO3 The organic layer was dried (Na2SO4) concentrated in vacuo The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane)

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

Procedure: A suspension of 10% Pd/C (30 mg) in a mixture of IMS (3 mL) and EtOAc (5 mL) was stirred under an atmosphere of hydrogen for 15 min before a solution of 5-fluoro-2-methyl-8-nitro-1,2-dihydroquinoline (76.8 mg, 0.369 mmol) in EtOAc (15 mL) was added. The reaction mixture was stirred at RT under a hydrogen atmosphere for 20 h. The suspension was then filtered through a pad of Celite® and the filtrate was concentrated in vacuo affording a mixture of the title compound and 5-fluoro-2-methylquinolin-8-ylamine as a purple oil. LCMS (Method J): RT 1.90 min (28%) [M+H]+ 181 and 2.26 min (42%) [M+H]+ 177 was added The suspension was then filtered through a pad of Celite® the filtrate was concentrated in vacuo affording

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

Procedure: To the mixture of 5-fluoro-2-methyl-1,2,3,4-tetrahydroquinolin-8-ylamine and 5-fluoro-2-methylquinolin-8-ylamine from the previous step (0.369 mmol) in DCM (10 mL) was added (S)-2-tert-butoxycarbonylaminopropionic acid (76.8 mg, 0.405 mmol) and HOAt (56 mg, 0.41 mmol). The mixture was cooled in an ice bath, then EDCI HCl (85 mg, 0.44 mmol) was added. The reaction mixture was stirred in the ice bath for 2 h, then diluted with DCM, washed with aqueous Na2CO3 and then water. The organic layer was dried (Na2SO4) and then concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane) affording the title compound as a colourless solid (63.6 mg, 49%, 2 steps). LCMS (Method J): RT 3.40 min [M+H]+ 352 The mixture was cooled in an ice bath washed with aqueous Na2CO3 The organic layer was dried (Na2SO4) concentrated in vacuo The resulting residue was purified by column chromatography (Si—PCC, gradient 20-50% EtOAc in cyclohexane)

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

Procedure: A suspension of 10% Pd/C (30 mg) in a mixture of IMS (3 mL) and EtOAc (5 mL) was stirred under an atmosphere of hydrogen for 15 min before a solution of 5-fluoro-2-methyl-8-nitro-1,2-dihydroquinoline (76.8 mg, 0.369 mmol) in EtOAc (15 mL) was added. The reaction mixture was stirred at RT under a hydrogen atmosphere for 20 h. The suspension was then filtered through a pad of Celite® and the filtrate was concentrated in vacuo affording a mixture of the title compound and 5-fluoro-2-methylquinolin-8-ylamine as a purple oil. LCMS (Method J): RT 1.90 min (28%) [M+H]+ 181 and 2.26 min (42%) [M+H]+ 177 was added The suspension was then filtered through a pad of Celite® the filtrate was concentrated in vacuo affording