3-(4-Methylpiperazin-1-yl)aniline → N(8)-(2-Methanesulfonyl-phenyl)-N(2)-[3-(4-methyl-piperazin-1-yl)-phenyl]-[1,2,4]triazolo[1,5-a]pyridine-2,8-diamine

HRID 1889809Notes

Reaction equation

HRID 1889809 reaction equation
Cl[C:2]1[N:21]=[C:5]2[C:6]([NH:10][C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[S:17]([CH3:20])(=[O:19])=[O:18])=[CH:7][CH:8]=[CH:9][N:4]2[N:3]=1.[CH3:22][N:23]1[CH2:28][CH2:27][N:26]([C:29]2[CH:30]=[C:31]([CH:33]=[CH:34][CH:35]=2)[NH2:32])[CH2:25][CH2:24]1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)CCCCC1>>[CH3:20][S:17]([C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=1[NH:10][C:6]1[C:5]2[N:4]([N:3]=[C:2]([NH:32][C:31]3[CH:33]=[CH:34][CH:35]=[C:29]([N:26]4[CH2:25][CH2:24][N:23]([CH3:22])[CH2:28][CH2:27]4)[CH:30]=3)[N:21]=2)[CH:9]=[CH:8][CH:7]=1)(=[O:19])=[O:18]

Participants

4

Reactant 3

HCID 115646133-(4-Methylpiperazin-1-yl)anilineHCID 249469872,2'-Bis(dicyclohexylphosphino)-1,1'-biphenylHCID 67478992(2-Chloro-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-(2-methanesulfonyl-phenyl)-amine

Product 1

HCID 49838776N(8)-(2-Methanesulfonyl-phenyl)-N(2)-[3-(4-methyl-piperazin-1-yl)-phenyl]-[1,2,4]triazolo[1,5-a]pyridine-2,8-diamine

Procedure

To a cooled, stirred suspension of 8-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine (0.961 g, 4.51 mmol) and copper(II)chloride dihydrate (0.20 g, 1.2 mmol) in 12 M of hydrochloric acid (10.0 mL) at 5° C. was added dropwise a solution of sodium nitrite (0.37 g, 5.4 mmol) in water (2 mL). Gentle gas evolution was noted. The mixture was stirred for 30 minutes at 5° C. then at room temperature for 18 hours. The yellow mixture was diluted with water (80 mL) and the resulting precipitate was filtered, rinsed with water and dried in-the-air. 8-Bromo-2-chloro-[1,2,4]triazolo[1,5-a]pyridine was isolated as a pale yellow solid (0.947 g, 90%) and was used without further purification. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 8.98 (d, J=6.9 Hz, 1H), 8.10 (d, J=7.8 Hz, 1H), 7.22 (t, J=7.0 Hz, 1H). MS=232, 234, 236 (MH)+. 68b) (2-Chloro-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-(2-methanesulfonyl-phenyl)-amine was prepared from 8-bromo-2-chloro-[1,2,4]triazolo[1,5-a]pyridine (234.0 mg, 1.007 mmol) and 2-methanesulfonyl-phenylamine; hydrochloride (220.0 mg, 1.059 mmol) with 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (105.0 mg, 0.1815 mmol) as the ligand in a manner analogous to Step 2d. The reaction product was isolated as a pale yellow solid (0.115 g, 35%). MP=180-182° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.52 (s, 1H), 8.18 (d, J=6.7 Hz, 1H), 8.00 (d, J=8.0 Hz, 1H), 7.60-7.54 (m, 1H), 7.51 (d, J=8.2, 1H), 7.34 (d, J=7.7 Hz, 1H), 7.18 (t, J=7.2 Hz, 1H), 6.98 (t, J=7.2 Hz, 1H), 3.12 (s, 3H). MS=323, 325 (MH)+. 68c) N(8)-(2-Methanesulfonyl-phenyl)-N(2)-[3-(4-methyl-piperazin-1-yl)-phenyl]-[1,2,4]triazolo[1,5-a]pyridine-2,8-diamine was prepared from (2-chloro-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-(2-methanesulfonyl-phenyl)-amine (95.0 mg, 0.294 mmol) and 3-(4-methylpiperazin-1-yl)aniline (70.0 mg, 0.366 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (32.0 mg, 0.0585 mmol) as the ligand in a manner analogous to Step 2d. The title compound was isolated as a light brown foam (0.077 g, 55%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.51 (s, 1H), 8.11 (d, J=6.5, 1H), 7.98 (d, J=7.8 Hz, 1H), 7.58-7.51 (m, 2H), 7.43 (s, 1H), 7.30-7.25 (m, 1H), 7.20 (t, J=8.1 Hz, 1H), 6.92 (d, J=8.0 Hz, 1H), 6.84-6.78 (m, 2H), 6.57 (d, J=8.1 Hz, 1H), 3.33-3.25 (m, 4H), 3.13 (s, 3H), 2.70-2.57 (m, 4H), 2.39 (s, 3H). MS=478 (MH)+.

Sources & evidence

ORD record
ord-6e2c5a2251474409b880609a68162820
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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