1H-Pyrazole-4-boronic acid → HCID 67481468, compound

HRID 1889771Notes

Reaction equation

HRID 1889771 reaction equation
Br[C:2]1[C:3]2[N:4]([N:8]=[C:9]([NH:11][C:12]3[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[CH:14][CH:13]=3)[N:10]=2)[CH:5]=[CH:6][CH:7]=1.[NH:20]1[CH:24]=[C:23](B(O)O)[CH:22]=[N:21]1>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH3:19][O:18][C:15]1[CH:16]=[CH:17][C:12]([NH:11][C:9]2[N:10]=[C:3]3[C:2]([C:23]4[CH:24]=[N:20][NH:21][CH:22]=4)=[CH:7][CH:6]=[CH:5][N:4]3[N:8]=2)=[CH:13][CH:14]=1

Participants

4

Reactant 2

HCID 177502781H-Pyrazole-4-boronic acidHCID 67478829(8-Bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-(4-methoxy-phenyl)-amine

Product 1

HCID 67481468HCID 67481468, compound

Reagents, catalysts & solvents 1

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)Catalyst

Procedure

(4-Methoxy-phenyl)-[8-(1H-pyrazol-4-yl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine was prepared from (8-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-(4-methoxy-phenyl)-amine (200.0 mg, 0.6266 mmol) and 1H-pyrazole-4-boronic acid (75.0 mg, 0.670 mmol) with Pd(dppf)Cl2 (50.0 mg) as the catalyst in a manner analogous to Step 2c and was isolated as a brown solid (0.065 g, 34%). MP=224-226° C. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 13.03 (br s, 1H), 9.38 (s, 1H), 8.59 (d, J=6.5 Hz, 1H), 8.49 (s, 2H), 7.85 (d, J=7.2 Hz, 1H), 7.64 (d, J=8.0 Hz, 2H), 7.11 (t, J=7.2 Hz, 1H), 6.91 (d, J=8.4 Hz, 2H), 3.73 (s, 3H). MS=307 (MH)+.

Sources & evidence

ORD record
ord-54130a1dacd946e897e35b6c717141a0
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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