Diethyl Ether → acetic acid 1-[2-(4-fluoro-2-methyl-phenylamino)-1,6-dimethyl-9-oxo-8,9-dihydro-1H-imidazo[4,5-h]isoquinolin-7-yl]-allyl ester

HRID 562439Notes

Reaction equation

HRID 562439 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[N:10]([CH3:28])[C:11]3[C:20]4[C:19](=[O:21])[NH:18][C:17]([CH:22]([OH:25])[CH:23]=[CH2:24])=[C:16]([CH3:26])[C:15]=4[CH:14]=[CH:13][C:12]=3[N:27]=2)=[C:4]([CH3:29])[CH:3]=1.[C:30](OC(=O)C)(=[O:32])[CH3:31].C(OCC)C>CN(C1C=CN=CC=1)C.C(Cl)Cl.CO.C(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[N:10]([CH3:28])[C:11]3[C:20]4[C:19](=[O:21])[NH:18][C:17]([CH:22]([O:25][C:30](=[O:32])[CH3:31])[CH:23]=[CH2:24])=[C:16]([CH3:26])[C:15]=4[CH:14]=[CH:13][C:12]=3[N:27]=2)=[C:4]([CH3:29])[CH:3]=1

Participants

7

Reactant 3

HCID 3283Diethyl EtherHCID 7918Acetic AnhydrideHCID 668328842-(4-Fluoro-2-methyl-phenylamino)-7-(1-hydroxy-allyl)-1,6-dimethyl-1,8-dihydro-imidazo[4,5-h]isoquinolin-9-one

Product 1

HCID 66832334acetic acid 1-[2-(4-fluoro-2-methyl-phenylamino)-1,6-dimethyl-9-oxo-8,9-dihydro-1H-imidazo[4,5-h]isoquinolin-7-yl]-allyl esterYield 80.4%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×HCID 21226129Dichloromethane methanolSolvent

Conditions

Temperature
-5 °C

Procedure

To a 500 mL round-bottom flask equipped with a magnetic stir-bar was added 2-(4-fluoro-2-methyl-phenylamino)-7-(1-hydroxy-allyl)-1,6-dimethyl-1,8-dihydro-imidazo[4,5-h]isoquinolin-9-one (7.8 g, 20 mmole), DCM (100 mL), TEA (3.0 g, 30 mmole), and DMAP (25 mg, 0.2 mmole). To the rapidly stirred suspension at room temperature was added acetic anhydride (2.3 g, 23 mmole). The reaction was complete after 10 minutes as determined by TLC analysis. The mixture was diluted with DCM (100 mL), and washed with saturated aqueous ammonium chloride. The aqueous layer was back-extracted with additional DCM (100 mL). The combined organic fractions were washed with brine (2×100 mL), dried over sodium sulfate, and concentrated in vacuo to give an amorphous orange solid. The crude product was re-dissolved in 5% MeOH/DCM (65 mL). To the stirred solution was added diethyl ether (200 mL), which resulted in the formation of a bright yellow precipitate. The stirred suspension was cooled over a salt/ice bath to −5° C., then filtered to recover the solids. The solids were washed sparingly with diethyl ether and collected to provide acetic acid 1-[2-(4-fluoro-2-methyl-phenylamino)-1,6-dimethyl-9-oxo-8,9-dihydro-1H-imidazo[4,5-h]isoquinolin-7-yl]-allyl ester (6.94 g, 80.4%) as a yellow powder. 1H NMR (400 MHz, DMSO-d6+TFA) δ 11.35 (br s, 1H), 10.55 (br s, 1H), 7.74 (d, 1H, J=9.0 Hz), 7.70 (d, 1H, J=8.6 Hz), 7.56 (dd, 1H, J1=5.5 Hz, J2=8.6 Hz), 7.37-7.34 (m, 3H), 7.25 (td, 1H, J1=2.7 Hz, J2=8.2 Hz), 6.34 (app d, 1H, J=6.3 Hz), 6.17 (ddd, 1H, J1=6.3 Hz, J2=10.2 Hz, J3=16.8 Hz), 5.41 (app d, 1H, J=17.2 Hz), 5.33 (app d, 1H, J=10.2 Hz), 4.18 (s, 3H), 2.32 (s, 3H), 2.12 (s, 3H); ESMS (m/z): 435 (M+1)+.

Workup

  1. customTo a 500 mL round-bottom flask equipped with a magnetic stir-bar
  2. washwashed with saturated aqueous ammonium chloride
  3. extractionThe aqueous layer was back-extracted with additional DCM (100 mL)
  4. washThe combined organic fractions were washed with brine (2×100 mL)
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated in vacuo
  7. customto give an amorphous orange solid
  8. customresulted in the formation of a bright yellow precipitate
  9. filtrationfiltered
  10. customto recover the solids
  11. washThe solids were washed sparingly with diethyl ether
  12. customcollected

Sources & evidence

ORD record
ord-bb74ff2f336f4421a536fac90469f213
Source dataset
uspto-grants-2011_11
Patent number
US08067395B2

Reaction notes

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