4-(Trifluoromethyl)phenylboronic acid → (2-Methoxy-phenyl)-[8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine

HRID 1889749Notes

Reaction equation

HRID 1889749 reaction equation
Br[C:2]1[C:3]2[N:4]([N:8]=[C:9]([NH:11][C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=3[O:18][CH3:19])[N:10]=2)[CH:5]=[CH:6][CH:7]=1.[F:20][C:21]([F:32])([F:31])[C:22]1[CH:27]=[CH:26][C:25](B(O)O)=[CH:24][CH:23]=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:13]1[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=1[NH:11][C:9]1[N:10]=[C:3]2[C:2]([C:25]3[CH:26]=[CH:27][C:22]([C:21]([F:32])([F:31])[F:20])=[CH:23][CH:24]=3)=[CH:7][CH:6]=[CH:5][N:4]2[N:8]=1

Participants

4

Reactant 2

HCID 27343894-(Trifluoromethyl)phenylboronic acidHCID 67481519(8-Bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-(2-methoxy-phenyl)-amine

Product 1

HCID 67479270(2-Methoxy-phenyl)-[8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine

Reagents, catalysts & solvents 1

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

Procedure

1-(3-Bromo-pyridin-2-yl)-3-(2-methoxy-phenyl)-thiourea was prepared from 3-bromo-pyridin-2-ylamine (5.0 g, 29.0 mmol) and 1-isothiocyanato-2-methoxy-benzene (4.0 mL, 29.0 mmol) in a manner analogous to Step 19a. The reaction product was isolated as a yellow solid (8.46 g, 86%). 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 13.62 (br s, 1H), 8.75-8.65 (m, 2H), 8.21 (dd, J=5.1, 1.5 Hz, 1H), 7.91 (dd, J=8.0, 1.6, Hz, 1H), 7.21 (dt, J=7.9, 1.5 Hz, 1H), 7.06-7.00 (m, 1H), 6.98-6.94 (m, 1H), 6.91 (dd, J=7.9, 5.0 Hz, 1H), 3.93 (s, 3H). MS=340 (MH)+. 20b) (8-Bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-(2-methoxy-phenyl)-amine was prepared from 1-(3-bromo-pyridin-2-yl)-3-(2-methoxy-phenyl)-thiourea (2.0 g) in a manner analogous to Step 19b. The reaction product was isolated as a white solid (0.47 g, 25%). MP=186-187° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.42 (d, J=6.7 Hz, 1H), 8.31 (dd, J=8.0, 1.1 Hz, 1H), 7.72 (s, 1H), 7.65 (d, J=7.6 Hz, 1H), 7.06-7.01 (m, 1H), 6.95 (ddd, J=8.1, 8.1, 1.1 Hz, 1H), 6.91-6.88 (m, 1H), 6.78-6.73 (m, 1H), 3.90 (s, 3H). MS=319, 321 (MH)+. 20c) (2-Methoxy-phenyl)-[8-(4-trifluoromethyl-phenyl)-[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)-(2-methoxy-phenyl)-amine (50.0 mg, 0.157 mmol) and (4-trifluoromethylphenyl)boronic acid (33.0 mg, 0.174 mmol) with Pd(dppf)Cl2 (0.012 g) as the catalyst in a manner analogous to Step 2e. The reaction product was isolated as a white solid (0.032 g, 53%). MP=184-186° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.49 (dd, J=6.8, 0.9 Hz, 1H), 8.38 (dd, J=8.0, 1.3 Hz, 1H), 8.14 (d, J=8.4 Hz, 2H), 7.78 (d, J=8.3 Hz, 2H), 7.63-7.58 (m, 2H), 7.08-6.88 (m, 4H), 3.92 (s, 3H). MS=385 (MH)+.

Sources & evidence

ORD record
ord-5498c0ae7df8479787aeb9193e542bc6
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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