Methanol → 4-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenol

HRID 1889755Notes

Reaction equation

HRID 1889755 reaction equation
[CH3:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[C:12]3[N:13]([N:17]=[C:18]([NH:20][C:21]4[CH:26]=[CH:25][C:24]([O:27]C)=[CH:23][CH:22]=4)[N:19]=3)[CH:14]=[CH:15][CH:16]=2)=[CH:7][CH:6]=1)(=[O:4])=[O:3].B(Br)(Br)Br.CO>ClCCl>[CH3:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[C:12]3[N:13]([N:17]=[C:18]([NH:20][C:21]4[CH:22]=[CH:23][C:24]([OH:27])=[CH:25][CH:26]=4)[N:19]=3)[CH:14]=[CH:15][CH:16]=2)=[CH:7][CH:6]=1)(=[O:4])=[O:3]

Participants

5

Reactant 3

HCID 887MethanolHCID 25134Boron tribromideHCID 57502381[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-(4-methoxy-phenyl)-amine

Product 1

HCID 674788544-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenol

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a suspension of [8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-(4-methoxy-phenyl)-amine (150.0 mg, 0.3803 mmol) in dichloromethane (10 mL, was added dropwise 1.0 M of boron tribromide in dichloromethane (1.2 mL, 1.2 mmol). The mixture was stirred for 1 hour at room temperature then methanol (5 mL) was added slowly. The mixture was evaporated to dryness. Additional methanol (10 mL) was added and the mixture was evaporated to dryness. The brown solid was suspended in saturated sodium bicarbonate (10 mL) and extracted with ethyl acetate (3×20 mL). The combined organic layers were dried over magnesium sulfate, filtered and evaporated to a solid. 4-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenol was isolated without further purification as a light brown solid (0.115 g, 80%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.47 (dd, J=6.7, 0.9 Hz, 1H), 8.22 (d, J=8.4 Hz, 2H), 8.08 (d, J=8.5 Hz, 2H), 7.64 (dd, J=7.4, 0.8 Hz, 1H), 7.44 (d, J=8.7 Hz, 2H), 7.00 (dd, J=7.1, 7.1 Hz, 1H), 6.84 (d, J=8.6 Hz, 2H), 6.73 (s, 1H), 4.72 (br s, 1H), 3.09 (s, 3H). MS=381 (MH)+. 26b) A suspension of 4-[8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenol (50.0 mg, 0.131 mmol), 4-(2-chloroethyl)-morpholine hydrochloride (27.0 mg, 0.145 mmol) and potassium carbonate (36.0 mg, 0.260 mmol) in acetonitrile (1 mL) was heated at 70° C. for 18 hours. The mixture was cooled to room temperature, diluted with acetonitrile (10 mL), filtered through a plug of diatomaceous earth and evaporated to an orange resin. The residue was purified via chromatography utilizing an ISCO automated purification apparatus with silica gel column (12 g) and 0%→10% methanol:dichloromethane solvent gradient. The title compound, [8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-[4-(2-morpholin-4-yl-ethoxy)-phenyl]-amine, was isolated as a yellow foam (0.047 g, 72%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.47 (d, J=6.5 Hz, 1H), 8.23 (d, J=8.4 Hz, 2H), 8.07 (d, J=8.3 Hz, 2H), 7.64 (d, J=7.4 Hz, 1H), 7.51-7.46 (m, 2H), 7.00 (t, J=7.0 Hz, 1H), 6.96-6.90 (m, 2H), 6.73 (s, 1H), 4.12 (t, J=5.8 Hz, 2H), 3.77-3.72 (m, 4H), 3.10 (s, 3H), 2.80 (t, J=5.6 Hz, 2H), 2.62-2.55 (m, 4H). MS=494 (MH)+.

Workup

  1. customThe mixture was evaporated to dryness
  2. additionAdditional methanol (10 mL) was added
  3. customthe mixture was evaporated to dryness
  4. extractionextracted with ethyl acetate (3×20 mL)
  5. dry with materialThe combined organic layers were dried over magnesium sulfate
  6. filtrationfiltered
  7. customevaporated to a solid

Sources & evidence

ORD record
ord-7c4890dfddd44a528f0dcab8e200c137
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

Loading…