Triethylamine → 4-(3-(4-methoxypiperidine-1-carbonyl)benzyl)-5,7-dimethyl-2,6-dihydro-1H-pyrrolo[3,4-d]pyridazin-1-one

HRID 1091735Notes

Reaction equation

HRID 1091735 reaction equation
[CH3:1][C:2]1[NH:3][C:4]([CH3:22])=[C:5]2[C:10]=1[C:9]([CH2:11][C:12]1[CH:13]=[C:14]([CH:18]=[CH:19][CH:20]=1)[C:15](O)=[O:16])=[N:8][NH:7][C:6]2=[O:21].[CH3:23][O:24][CH:25]1[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]1.C(N(CC)CC)C>CN(C=O)C>[CH3:23][O:24][CH:25]1[CH2:30][CH2:29][N:28]([C:15]([C:14]2[CH:13]=[C:12]([CH:20]=[CH:19][CH:18]=2)[CH2:11][C:9]2[C:10]3[C:5](=[C:4]([CH3:22])[NH:3][C:2]=3[CH3:1])[C:6](=[O:21])[NH:7][N:8]=2)=[O:16])[CH2:27][CH2:26]1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 776664-MethoxypiperidineHCID 136101881HCID 136101881, compound

Product 1

HCID 1363801884-(3-(4-methoxypiperidine-1-carbonyl)benzyl)-5,7-dimethyl-2,6-dihydro-1H-pyrrolo[3,4-d]pyridazin-1-oneYield 40.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

2-(1H-Benzo[d][1,2,3]triazol-1-yl)-1,1,3,3-tetramethylisouronium hexafluorophosphate(V) (0.179 g, 0.47 mmol) was added to 3-((5,7-dimethyl-1-oxo-2,6-dihydro-1H-pyrrolo[3,4-d]pyridazin-4-yl)methyl)benzoic acid (51) (0.100 g, 0.34 mmol), 4-methoxypiperidine (0.043 g, 0.37 mmol) and triethylamine (0.117 mL, 0.84 mmol) in DMF (2 mL). The resulting solution was stirred at room temperature for 5 hours. The crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the desired compound (0.054 g, 40.9% yield). 1H NMR (400.132 MHz, DMSO) δ 1.18-1.93 (4H, m), 2.24 (3H, s), 2.51 (3H, s), 3.02-3.19 (2H, m), 3.25 (3H, s), 3.40 (2H, m), 3.76-3.97 (1H, m), 4.09 (2H, s), 7.14 (1H, s), 7.20 (1H, d), 7.27 (1H, d), 7.36 (1H, t), 11.08 (1H, s), 11.92 (1H, s); m/z (LC-MS, ESI+), RT=1.38 min (M+H=395.09).

Workup

  1. customThe crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length)
  2. additionFractions containing the desired compound
  3. customwere evaporated to dryness

Sources & evidence

ORD record
ord-0754332cbe144e3e94fc985ac1714fd0
Source dataset
uspto-grants-2012_03
Patent number
US08129380B2

Reaction notes

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