2,6-Lutidine → (2-{Acetyl-[4-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enyl]-amino}-ethyl)-phosphonic Acid

HRID 910519Notes

Reaction equation

HRID 910519 reaction equation
C([O:3][P:4]([CH2:9][CH2:10][N:11]([C:37](=[O:39])[CH3:38])[CH2:12][C:13]([CH3:36])=[CH:14][CH2:15][C:16]1[C:17]([O:29]CC[Si](C)(C)C)=[C:18]2[C:22](=[C:23]([CH3:27])[C:24]=1[O:25][CH3:26])[CH2:21][O:20][C:19]2=[O:28])(=[O:8])[O:5]CC)C.C[Si](Br)(C)C.N1C(C)=CC=CC=1C>C(#N)C>[C:37]([N:11]([CH2:12][C:13]([CH3:36])=[CH:14][CH2:15][C:16]1[C:17]([OH:29])=[C:18]2[C:22](=[C:23]([CH3:27])[C:24]=1[O:25][CH3:26])[CH2:21][O:20][C:19]2=[O:28])[CH2:10][CH2:9][P:4](=[O:3])([OH:5])[OH:8])(=[O:39])[CH3:38]

Participants

5

Reactant 3

HCID 79372,6-LutidineHCID 76113BromotrimethylsilaneHCID 76546195HCID 76546195, compound

Product 1

HCID 67011534(2-{Acetyl-[4-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enyl]-amino}-ethyl)-phosphonic AcidYield 53%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of [2-(acetyl-{4-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enyl}-amino)-ethyl]-phosphonic acid diethyl ester (14 mg, 0.024 mmol) in acetonitrile (0.5 mL) was added TMSBr (31 μL, 0.24 mmol) and 2,6-lutidine (28 μL, 0.24 μmmol). The solution was stirred at room temperature for 1 hour. The reaction was quenched by addition of methanol and aqueous 1N HCl. The product was extracted with EtOAc. The combined organic extracts were dried over Na2SO4 and concentrated in vacuo. The product was purified by RP HPLC using a C18 column with a gradient of H2O, 0.1% TFA-acetonitrile, 0.1% TFA to provide 5.4 mg of the product (53%) as a white solid. The NMR data of this compound shows two rotamers. 1H NMR (300 MHz, CDCl3) δ 1.67 and 1.73 (s, 3H), 1.85-2.12 (m, 5H), 2.13 (s, 3H), 3.30-3.61 (m, 4H), 3.75 (s, 3H), 3.76 (br s, 2H), 5.17 (s, 2H), 5.31 (br s, 1H) ppm; 31P (121.4 MHz, CDCl3) δ 27.5 and 28.8 ppm; MS (m/z) 428.2 [M+H]+, 450.2 [M+Na]+.

Workup

  1. customThe reaction was quenched by addition of methanol and aqueous 1N HCl
  2. extractionThe product was extracted with EtOAc
  3. dry with materialThe combined organic extracts were dried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe product was purified by RP HPLC

Sources & evidence

ORD record
ord-d456a60cbcc64effa1a13de7d37831aa
Source dataset
uspto-grants-2011_09
Patent number
US08022083B2

Reaction notes

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