8-Bromo-(1,2,4)triazolo(1,5-a)pyridin-2-amine → N-[4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-phenyl]-N-methyl-methanesulfonamide

HRID 1889798Notes

Reaction equation

HRID 1889798 reaction equation
Br[C:2]1[C:3]2[N:4]([N:8]=[C:9]([NH2:11])[N:10]=2)[CH:5]=[CH:6][CH:7]=1.[CH3:12][N:13]([C:18]1[CH:23]=[CH:22][C:21](B2OC(C)(C)C(C)(C)O2)=[CH:20][CH:19]=1)[S:14]([CH3:17])(=[O:16])=[O:15]>>[NH2:11][C:9]1[N:10]=[C:3]2[C:2]([C:21]3[CH:20]=[CH:19][C:18]([N:13]([CH3:12])[S:14]([CH3:17])(=[O:15])=[O:16])=[CH:23][CH:22]=3)=[CH:7][CH:6]=[CH:5][N:4]2[N:8]=1

Participants

3

Reactant 2

HCID 468640698-Bromo-(1,2,4)triazolo(1,5-a)pyridin-2-amineHCID 58354653N-methyl-N-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanesulfonamide

Product 1

HCID 67478821N-[4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-phenyl]-N-methyl-methanesulfonamide

Procedure

To a suspension of N-[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-phenyl]-methanesulfonamide (0.50 g, 1.7 mmol) and potassium carbonate (0.28 g, 2.0 mmol) in acetone (10 mL) was added methyl iodide (0.12 mL, 2.0 mmol). The mixture was stirred at room temperature for 18 hours under an atmosphere of nitrogen then diluted with dichloromethane (20 mL), filtered through a plug of diatomaceous earth, rinsed with dichloromethane and evaporated. The material was subjected to high vacuum for 18 hours. N-Methyl-N-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-phenyl]-methanesulfonamide was isolated as a yellow solid (0.50 g, 95%) and was used without further purification. 1H NMR (400 MHz, CDCl3, δ, ppm): 7.83 (d, J=7.9 Hz, 2H), 7.39 (d, J=7.8 Hz, 2H), 3.34 (s, 3H), 2.82 (s, 3H), 1.34 (s, 12H). MS=312 (MH)+. 62b) N-[4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-phenyl]-N-methyl-methanesulfonamide was prepared from 8-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine (300.0 mg, 1.408 mmol) and N-methyl-N-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-phenyl]-methanesulfonamide (500.0 mg, 1.607 mmol) in a manner analogous to Step 2c. The reaction product was isolated as an off-white solid (0.33 g, 73%). MP=245-247° C. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 8.55 (d, J=5.8 Hz, 1H), 8.12 (d, J=7.5 Hz, 2H), 7.72 (d, J=7.1, 1H), 7.52 (d, J=7.2 Hz, 2H), 6.98 (t, J=6.2 Hz, 1H), 6.11 (s, 2H), 3.29 (s, 3H), 2.98 (s, 3H). MS=318 (MH)+. 62c) N-Methyl-N-(4-{2-[4-(4-methyl-piperazin-1-yl)-phenylamino]-[1,2,4]triazolo[1,5-a]pyridin-8-yl}-phenyl)-methanesulfonamide was prepared from N-[4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-8-yl)-phenyl]-N-methyl-methanesulfonamide (75.0 mg, 0.236 mmol) and 1-(4-bromo-phenyl)-4-methyl-piperazine (70.0 mg, 0.274 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (26.0 mg, 0.0476 mmol) as the ligand in a manner analogous to Step 2d. The title compound was isolated as a tan solid (0.027 g, 23%). MP=205-206° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.41 (d, J=6.5 Hz, 1H), 8.04 (d, J=7.7 Hz, 2H), 7.57-7.46 (m, 5H), 6.99-6.91 (m, 3H), 6.66 (s, 1H), 3.38 (s, 3H), 3.19-3.14 (m, 4H), 2.90 (s, 3H), 2.62-2.57 (m, 4H), 2.36 (s, 3H). MS=492 (MH)+.

Workup

  1. customwas used without further purification

Sources & evidence

ORD record
ord-a13ac0cd41a34bb1b7aa5148407f9472
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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