1,1,3,3-Tetramethylguanidine → 5,7-dimethoxy-2-(6-(4-(2-methoxyethyl)piperazin-1-yl)pyridin-2-yl)quinazolin-4(3H)-one

HRID 922360Notes

Reaction equation

HRID 922360 reaction equation
F[C:2]1[N:7]=[C:6]([C:8]2[NH:17][C:16](=[O:18])[C:15]3[C:10](=[CH:11][C:12]([O:21][CH3:22])=[CH:13][C:14]=3[O:19][CH3:20])[N:9]=2)[CH:5]=[CH:4][CH:3]=1.[CH3:23][O:24][CH2:25][CH2:26][N:27]1[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]1.CN(C)C(N(C)C)=N>CS(C)=O.C(OCC)(=O)C>[CH3:20][O:19][C:14]1[CH:13]=[C:12]([O:21][CH3:22])[CH:11]=[C:10]2[C:15]=1[C:16](=[O:18])[NH:17][C:8]([C:6]1[CH:5]=[CH:4][CH:3]=[C:2]([N:30]3[CH2:31][CH2:32][N:27]([CH2:26][CH2:25][O:24][CH3:23])[CH2:28][CH2:29]3)[N:7]=1)=[N:9]2

Participants

6

Reactant 3

HCID 664601,1,3,3-TetramethylguanidineHCID 27346381-(2-Methoxyethyl)piperazineHCID 1364081482-(6-fluoropyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one

Product 1

HCID 1362488325,7-dimethoxy-2-(6-(4-(2-methoxyethyl)piperazin-1-yl)pyridin-2-yl)quinazolin-4(3H)-oneYield 49.9%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 2-(6-fluoropyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.100 g, 0.33 mmol), 1-(2-methoxyethyl)piperazine (0.072 g, 0.49 mmol) and 1,1,3,3-tetramethylguanidine (0.096 g, 0.83 mmol) in dry DMSO (2 mL) was heated at 80° C. for 17 h. After that time the reaction mixture was cooled to rt and diluted with ethyl acetate (30 mL). The organic phase was washed with water and brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol) to give 5,7-dimethoxy-2-(6-(4-(2-methoxyethyl)piperazin-1-yl)pyridin-2-yl)quinazolin-4(3H)-one (0.070 g, 49%) as a yellow solid: mp 99-101° C.; 1H NMR (400 MHz, CDCl3) δ 10.32 (s, 1H), 7.85 (d, J=7.42 Hz, 1H), 7.61-7.71 (m, 1H), 6.77-6.87 (m, 2H), 6.48 (d, J=1.95 Hz, 1H), 3.99 (s, 3H), 3.94 (s, 3H), 3.64-3.71 (m, 4H), 3.59 (t, J=5.47 Hz, 2H), 3.40 (s, 3H), 2.61-2.71 (m, 6H); ESI MS m/z 426 [M+H]+.

Workup

  1. temperatureAfter that time the reaction mixture was cooled to rt
  2. washThe organic phase was washed with water and brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol)

Sources & evidence

ORD record
ord-62edb79b42134b2383f5114526354937
Source dataset
uspto-grants-2016_03
Patent number
US09278940B2

Reaction notes

Loading…