Cesium carbonate → 2-(6-(4-isopropylpiperazin-1-yl)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one

HRID 922376Notes

Reaction equation

HRID 922376 reaction equation
Br[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][C:3]=1[O:23][CH3:24].[CH:25]([N:28]1[CH2:33][CH2:32][NH:31][CH2:30][CH2:29]1)([CH3:27])[CH3:26].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.C([O-])([O-])=O.[Cs+].[Cs+]>ClCCl.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH:25]([N:28]1[CH2:33][CH2:32][N:31]([C:2]2[N:7]=[C:6]([C:8]3[NH:17][C:16](=[O:18])[C:15]4[C:10](=[CH:11][C:12]([O:21][CH3:22])=[CH:13][C:14]=4[O:19][CH3:20])[N:9]=3)[CH:5]=[CH:4][C:3]=2[O:23][CH3:24])[CH2:30][CH2:29]1)([CH3:27])[CH3:26]

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 780131-IsopropylpiperazineHCID 634876Binap, (A+-)-HCID 1364081352-(6-bromo-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one

Product 1

HCID 1362488532-(6-(4-isopropylpiperazin-1-yl)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-oneYield 25%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 6344DichloromethaneSolvent

Conditions

Temperature
100 °C

Procedure

To a mixture of 2-(6-bromo-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.196 g, 0.50 mmol), 1-isopropylpiperazine (0.077 g, 0.60 mmol), BINAP (0.062 g, 0.10 mmol), and Cs2CO3 (0.652 g, 2.0 mmol) in nitrogen saturated dioxane (10 mL) was added palladium(II) acetate (0.022 g, 0.10 mmol). The resulting mixture was heated at 100° C. for 3 h. After that time the reaction was cooled to rt, diluted with dichloromethane (100 mL) and washed with water (20 mL). The organic phase was dried over Na2SO4 and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 90:10:0.1 dichloromethane/methanol/ammonium hydroxide) to give 2-(6-(4-isopropylpiperazin-1-yl)-5-methoxypyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.055 g, 25%) as a pale yellow solid: mp 208-210° C.; 1H NMR (400 MHz, CDCl3): δ 10.23 (br s, 1H), 8.08 (d, J=8.0 Hz, 1H), 7.17 (d, J=8.0 Hz, 1H), 6.79 (d, J=2.4 Hz, 1H), 6.45 (d, J=2.4 Hz, 1H), 3.98 (s, 3H), 3.95 (s, 3H), 3.93 (s, 3H), 3.56 (br s, 4H), 2.78 (br s, 5H), 1.15 (d, J=5.6 Hz, 6H); ESI MS m/z 440 [M+H]+.

Workup

  1. temperatureAfter that time the reaction was cooled to rt
  2. washwashed with water (20 mL)
  3. dry with materialThe organic phase was dried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. customThe product was purified by flash column chromatography (silica gel, 90:10:0.1 dichloromethane/methanol/ammonium hydroxide)

Sources & evidence

ORD record
ord-2eedb5bb241d45acac17cd2fe11e7834
Source dataset
uspto-grants-2016_03
Patent number
US09278940B2

Reaction notes

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