Acetic Acid → N-{[4-methoxy-6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridin-3-yl]methyl}pyridin-3-amine

HRID 1253529Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1253529
[CH3:1][O:2][C:3]1[C:4]2[N:5]([N:15]=[CH:16][C:17]=2[CH:18]=O)[CH:6]=[C:7]([C:9]2[CH:10]=[N:11][N:12]([CH3:14])[CH:13]=2)[CH:8]=1.[NH2:20][C:21]1[CH:22]=[N:23][CH:24]=[CH:25][CH:26]=1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.ClCCl>[CH3:1][O:2][C:3]1[C:4]2[N:5]([N:15]=[CH:16][C:17]=2[CH2:18][NH:20][C:21]2[CH:22]=[N:23][CH:24]=[CH:25][CH:26]=2)[CH:6]=[C:7]([C:9]2[CH:10]=[N:11][N:12]([CH3:14])[CH:13]=2)[CH:8]=1

Komponenten

7

Edukt 4

HCID 176Acetic AcidHCID 100093-AminopyridineHCID 5049666Sodium triacetoxyborohydrideHCID 866570544-methoxy-6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridine-3-carbaldehyde

Produkt 1

HCID 58404894N-{[4-methoxy-6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridin-3-yl]methyl}pyridin-3-amine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 111,2-DichloroethaneLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of 4-methoxy-6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridine-3-carbaldehyde (10.0 mg, 0.039 mmol), 3-aminopyridine (5.5 mg, 0.059 mmol), and acetic acid (50 μl) in 1,2-dichloroethane (1 ml) was stirred for 2 d. Sodium triacetoxyborohydride (24.8 mg, 0.117 mmol) was added and the mixture was stirred for 1 d. The mixture was diluted with dichloromethane and washed with saturated aqueous sodium bicarbonate. The organic layer was filtered with isoElute and concentrated. The residue was purified by column chromatography on silica gel (methanol/ethyl acetate gradient) to give N-{[4-methoxy-6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridin-3-yl]methyl}pyridin-3-amine 1H NMR (500 MHz, CDCl3) δ 8.52 (s, 1H); 8.21 (s, 1H); 8.00 (d, 1H); 7.96 (s, 1H), 7.80 (s, 1H), 7.69 (d, 1H), 7.02 (d, 1H), 6.95 (d, 1H), 6.81 (s, 1H), 6.08 (t, 1H), 4.47 (s, 2H), 3.98 (s, 3H), 3.82 (s, 3H) LRMS (ESI) calculated for C18H19N6O [M+H]+, 335.2; found 335.1.

Aufarbeitung

  1. washwashed with saturated aqueous sodium bicarbonate
  2. filtrationThe organic layer was filtered with isoElute and
  3. concentrationconcentrated
  4. customThe residue was purified by column chromatography on silica gel (methanol/ethyl acetate gradient)

Quellen und Nachweise

ORD-Eintrag
ord-28d4234df1ab4b9897dcedc0fa6812f2
Quelldatensatz
uspto-grants-2013_06
Patentnummer
US08455477B2

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