4-(Dimethylamino)Benzaldehyde → HCID 178482663, compound

HRID 416747Notes

Reaction equation

HRID 416747 reaction equation
[Br:1][C:2]1[C:3]([N:12]2[CH2:18][CH2:17][CH2:16][N:15]([CH2:19][C:20]3[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=3)[CH2:14][CH2:13]2)=[C:4]([N+:9]([O-])=O)[C:5]([NH2:8])=[N:6][CH:7]=1.[CH3:27][N:28]([CH3:37])[C:29]1[CH:36]=[CH:35][C:32]([CH:33]=O)=[CH:31][CH:30]=1.[O-]S(S([O-])=O)=O.[Na+].[Na+]>C(O)C>[Br:1][C:2]1[C:3]([N:12]2[CH2:18][CH2:17][CH2:16][N:15]([CH2:19][C:20]3[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=3)[CH2:14][CH2:13]2)=[C:4]2[N:9]=[C:33]([C:32]3[CH:35]=[CH:36][C:29]([N:28]([CH3:37])[CH3:27])=[CH:30][CH:31]=3)[NH:8][C:5]2=[N:6][CH:7]=1

Participants

5

Reactant 3

HCID 74794-(Dimethylamino)BenzaldehydeHCID 24489Sodium DithioniteHCID 57897211HCID 57897211, compound

Product 1

HCID 178482663HCID 178482663, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
70 °C

Procedure

To a mixture of 5-bromo-4-(4-(4-fluorobenzyl)-1,4-diazepan-1-yl)-3-nitropyridin-2-amine (0.047 g, 0.11 mmol), ethanol (4 ml), and 4-dimethylaminobenzaldehyde (0.021 g, 0.14 mmol) was added a freshly prepared aqueous solution of Na2S2O4 (1M; 0.44 ml, 0.44 mmol). The reaction mixture was heated at 70° C. for 4.5 h, then allowed to cool to room temperature and the solvents were removed in vacuo. The residue was absorbed on silica gel and the free running powder was placed on a 10 g isolute silica column which was eluted with 0 to 5% methanol in ethyl acetate/dichloromethane (v/v; 1:1). The title compound was obtained as a yellow solid (0.020 g, 35%); 1H-NMR (500 MHz, DMSO-d6) 2.00 (m, 2H), 2.75-2.85 (m, 4H) and 3.86 (m, 4H) (homopiperazine protons), 2.99 (s, 6H, N(CH3)2), 3.66 (s, 2H, N—CH2), 6.82 (d, J=9.00 Hz, 2H) and 8.00 (d, J=8.84 Hz, 2H) (3,5-C6H4NMe2 and 2,6-C6H4—NMe2), 7.14 (t, J=8.93 Hz, 2H) and 7.39 (dd, J=8.13, 5.42 Hz, 2H) (3,5-ArH and 2,6-ArH), 8.11 (s, 1H, imidazo[4,5-b]pyridine 5-H), 13.08 (s, 1H, imidazo[4,5-b]pyridine N—H);

Workup

  1. temperatureto cool to room temperature
  2. customthe solvents were removed in vacuo
  3. customThe residue was absorbed on silica gel
  4. washwas eluted with 0 to 5% methanol in ethyl acetate/dichloromethane (v/v; 1:1)

Sources & evidence

ORD record
ord-b8fd05818be3402cb74af0f829a1e517
Source dataset
uspto-grants-2012_01
Patent number
US08088761B2

Reaction notes

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