1-(azidomethyl)-4-fluorobenzene

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

Procedure: Compound 8 (194 mg, 1 mmol) and 2,4-dimethoxyaniline (9 g, 153 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(2,4-dimethoxyphenylamino)-N-(prop-2-ynyl)nicotinamide 10g as pure product. To a solution of 2-(2,4-dimethoxyphenylamino)-N-(prop-2-ynyl)nicotinamide (10 g, 150 mg, 0.48 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 79 mg, 0.53 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 12 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2g (167 mg, 70%); mp: 146-148° C.; 1H NMR (300 MHz, CDCl3) δ 10.33 (s, 1H), 8.25 (dd, J=7.5, 1.5 Hz, 1H), 7.72 (dd, J=7.5, 1.5 Hz, 1H), 7.53 (s, 1H), 7.28-7.23 (m, 3H), 7.18-7.13 (m, 1H), 7.03 (t, J=8.3 Hz, 2H), 6.58-6.54 (m, 1H), 6.46 (s, 2H), 5.45 (s, 2H), 4.64 (d, J=5.2 Hz, 2H), 3.90 (s, 3H), 3.79 (s, 3H); MS (ESI m/z): 463 [M+H]+. Yield: 70% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Compound 8 (194 mg, 1 mmol) and 4-methoxyaniline (9e, 123 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(4-methoxyphenylamino)-N-(prop-2-ynyl)nicotinamide 10e as pure product. To a solution of 2-(4-methoxyphenylamino)-N-(prop-2-ynyl)nicotinamide (10e, 150 mg, 0.53 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 88 mg, 0.58 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 11 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2e (173 mg, 75%); mp: 169-171° C.; 1H NMR (500 MHz, CDCl3) δ 10.26 (s, 1H), 8.23 (dd, J=4.0, 1.5 Hz, 1H), 7.74 (dd, J=8.0, 1.5 Hz, 1H), 7.50 (d, J=9.0 Hz, 1H), 7.29-7.24 (m, 4H), 7.06 (t, J=9.0 Hz, 2H), 6.83 (d, J=9.0 Hz, 2H), 6.59-6.50 (m, 1H), 5.47 (s, 2H), 4.64 (d, J=5.2 Hz, 2H), 3.78 (s, 3H); MS (ESI m/z): 433 [M+H]+. Yield: 75% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Compound 8 (194 mg, 1 mmol) and 4-fluoroaniline (9b, 111 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide 10b as pure product. To a solution of 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide (10b, 150 mg, 0.55 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 91 mg, 0.61 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 10 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2b (187 mg, 80%); mp: 197-199° C.; 1H NMR (300 MHz, CDCl3) δ 10.61 (s, 1H), 8.63 (brs, 1H), 8.24 (dd, J=4.4, 1.4 Hz, 1H), 7.98 (dd, J=, 8.0, 1.8 Hz, 1H), 7.64 (s, 1H), 7.63-7.58 (m, 2H), 7.41 (s, 1H), 7.23 (s, 1H), 6.98 (t, J=8.4 Hz, 2H), 6.88 (t J=8.4 Hz, 2H), 6.69-6.65 (m, 1H), 5.44 (s, 2H), 4.63 (d, J=5.5 Hz, 2H), 3.78 (s, 3H); MS (ESI m/z): 421 [M+H]+. Yield: 80% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Compound 8 (194 mg, 1 mmol) and 4-fluoroaniline (9b, 111 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide 10b as pure product. To a solution of 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide (10b, 150 mg, 0.55 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 91 mg, 0.61 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 10 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2b (187 mg, 80%); mp: 197-199° C.; 1H NMR (300 MHz, CDCl3) δ 10.61 (s, 1H), 8.63 (brs, 1H), 8.24 (dd, J=4.4, 1.4 Hz, 1H), 7.98 (dd, J=, 8.0, 1.8 Hz, 1H), 7.64 (s, 1H), 7.63-7.58 (m, 2H), 7.41 (s, 1H), 7.23 (s, 1H), 6.98 (t, J=8.4 Hz, 2H), 6.88 (t J=8.4 Hz, 2H), 6.69-6.65 (m, 1H), 5.44 (s, 2H), 4.63 (d, J=5.5 Hz, 2H), 3.78 (s, 3H); MS (ESI m/z): 421 [M+H]+. Yield: 80% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Following the procedure as described in Example 2, making variations as necessary to replace benzylazide with 1-(azidomethyl)-4-fluorobenzene to react with ethyl 2-ethynyl-4-methylthiazole-5-carboxylate, the title compound was obtained as a white solid in 62% yield: 1H NMR (300 MHz, CDCl3) δ 7.98 (s, 1H), 7.32-7.23 (m, 2H), 7.05-6.94 (m, 2H), 5.49 (s, 2H), 4.51 (q, J=7.1 Hz, 2H), 2.62 (s, 3H), 1.29 (t, J=7.1 Hz, 3H); MS (ES+) m/z 347.3 (M+1).

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

Procedure: Following the procedure as described in Example 2, making variations as necessary to replace benzylazide with 1-(azidomethyl)-4-fluorobenzene to react with ethyl 2-ethynyl-4-methylthiazole-5-carboxylate, the title compound was obtained as a white solid in 62% yield: 1H NMR (300 MHz, CDCl3) δ 7.98 (s, 1H), 7.32-7.23 (m, 2H), 7.05-6.94 (m, 2H), 5.49 (s, 2H), 4.51 (q, J=7.1 Hz, 2H), 2.62 (s, 3H), 1.29 (t, J=7.1 Hz, 3H); MS (ES+) m/z 347.3 (M+1).

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

Procedure: Following the procedure as described in Example 1, making variations as necessary to replace 1-(2-azidoethyl)-4-fluorobenzene with 1-(azidomethyl)-4-fluorobenzene to react with N-benzyl-2-ethynyl-4-methylthiazole-5-carboxamide, the title compound was obtained as a white solid in 59% yield: mp 114-115° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, CDCl3) δ 7.96 (s, 1H), 7.45-7.19 (m, 7H), 7.12-6.99 (m, 2H), 6.19 (t, J=5.6 Hz, 1H), 5.51 (s, 2H), 4.58 (d, J=5.6 Hz, 2H), 2.66 (s, 3H); 13C NMR (75 MHz, CDCl3) δ 162.9, 161.7, 157.8, 155.5, 142.9, 137.9, 130.3, 129.6, 128.7, 127.8, 127.6, 125.0, 121.9, 115.3, 53.8, 44.1, 17.2; MS (ES+) m/z 408.3 (M+1).

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

Procedure: Following the procedure as described in Example 1, making variations as necessary to replace 1-(2-azidoethyl)-4-fluorobenzene with 1-(azidomethyl)-4-fluorobenzene to react with N-benzyl-2-ethynyl-4-methylthiazole-5-carboxamide, the title compound was obtained as a white solid in 59% yield: mp 114-115° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, CDCl3) δ 7.96 (s, 1H), 7.45-7.19 (m, 7H), 7.12-6.99 (m, 2H), 6.19 (t, J=5.6 Hz, 1H), 5.51 (s, 2H), 4.58 (d, J=5.6 Hz, 2H), 2.66 (s, 3H); 13C NMR (75 MHz, CDCl3) δ 162.9, 161.7, 157.8, 155.5, 142.9, 137.9, 130.3, 129.6, 128.7, 127.8, 127.6, 125.0, 121.9, 115.3, 53.8, 44.1, 17.2; MS (ES+) m/z 408.3 (M+1).

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

Procedure: Compound 8 (194 mg, 1 mmol) and 2,4-dimethoxyaniline (9 g, 153 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(2,4-dimethoxyphenylamino)-N-(prop-2-ynyl)nicotinamide 10g as pure product. To a solution of 2-(2,4-dimethoxyphenylamino)-N-(prop-2-ynyl)nicotinamide (10 g, 150 mg, 0.48 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 79 mg, 0.53 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 12 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2g (167 mg, 70%); mp: 146-148° C.; 1H NMR (300 MHz, CDCl3) δ 10.33 (s, 1H), 8.25 (dd, J=7.5, 1.5 Hz, 1H), 7.72 (dd, J=7.5, 1.5 Hz, 1H), 7.53 (s, 1H), 7.28-7.23 (m, 3H), 7.18-7.13 (m, 1H), 7.03 (t, J=8.3 Hz, 2H), 6.58-6.54 (m, 1H), 6.46 (s, 2H), 5.45 (s, 2H), 4.64 (d, J=5.2 Hz, 2H), 3.90 (s, 3H), 3.79 (s, 3H); MS (ESI m/z): 463 [M+H]+. Yield: 70% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Compound 8 (194 mg, 1 mmol) and 4-methoxyaniline (9e, 123 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(4-methoxyphenylamino)-N-(prop-2-ynyl)nicotinamide 10e as pure product. To a solution of 2-(4-methoxyphenylamino)-N-(prop-2-ynyl)nicotinamide (10e, 150 mg, 0.53 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 88 mg, 0.58 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 11 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2e (173 mg, 75%); mp: 169-171° C.; 1H NMR (500 MHz, CDCl3) δ 10.26 (s, 1H), 8.23 (dd, J=4.0, 1.5 Hz, 1H), 7.74 (dd, J=8.0, 1.5 Hz, 1H), 7.50 (d, J=9.0 Hz, 1H), 7.29-7.24 (m, 4H), 7.06 (t, J=9.0 Hz, 2H), 6.83 (d, J=9.0 Hz, 2H), 6.59-6.50 (m, 1H), 5.47 (s, 2H), 4.64 (d, J=5.2 Hz, 2H), 3.78 (s, 3H); MS (ESI m/z): 433 [M+H]+. Yield: 75% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography

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

Procedure: Compound 8 (194 mg, 1 mmol) and 4-fluoroaniline (9b, 111 mg, 1 mmol) were taken in ethylene glycol and heated at 140° C. for 6 h. Then the reaction mixture was cooled and extracted with ethyl acetate from the aqueous layer and concentrated in vacuum. The compound was further purified by column chromatography using 60-120 silica gel to obtain 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide 10b as pure product. To a solution of 2-(4-fluorophenylamino)-N-(prop-2-ynyl)nicotinamide (10b, 150 mg, 0.55 mmol) and 1-(azidomethyl)-4-fluorobenzene (12b, 91 mg, 0.61 mmol) in 2:1 mixture of water and tert-butyl alcohol, sodium ascorbate (0.06 mmol) and copper (II) sulphate (0.005 mmol) were added sequentially. The reaction was stirred at room temperature for 10 h, TLC analysis indicated completion of reaction. The reaction mixture was concentrated under vacuum and extracted with EtOAc to give crude product. The crude was purified by column chromatography to afford pure product 2b (187 mg, 80%); mp: 197-199° C.; 1H NMR (300 MHz, CDCl3) δ 10.61 (s, 1H), 8.63 (brs, 1H), 8.24 (dd, J=4.4, 1.4 Hz, 1H), 7.98 (dd, J=, 8.0, 1.8 Hz, 1H), 7.64 (s, 1H), 7.63-7.58 (m, 2H), 7.41 (s, 1H), 7.23 (s, 1H), 6.98 (t, J=8.4 Hz, 2H), 6.88 (t J=8.4 Hz, 2H), 6.69-6.65 (m, 1H), 5.44 (s, 2H), 4.63 (d, J=5.5 Hz, 2H), 3.78 (s, 3H); MS (ESI m/z): 421 [M+H]+. Yield: 80% were added sequentially completion of reaction The reaction mixture was concentrated under vacuum extracted with EtOAc to give crude product The crude was purified by column chromatography