2,6-Lutidine → (2-{Benzyl-[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 32983Notes

Reaction equation

HRID 32983 reaction equation
C([O:3][P:4]([CH2:9][CH2:10][NH:11][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.N1[C:47]([CH3:48])=[CH:46][CH:45]=[CH:44][C:43]=1[CH3:49]>C(#N)C>[CH2:49]([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:8])([OH:5])[OH:3])[C:43]1[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=1

Participants

5

Reactant 3

HCID 79372,6-LutidineHCID 76113BromotrimethylsilaneHCID 76541029(2-{-4-[6-Methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enylamino}-ethyl)-phosphonic acid diethyl ester

Product 1

HCID 67010407(2-{Benzyl-[4-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enyl]-amino}-ethyl)-phosphonic AcidYield 96.4%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A solution of (2-{4-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enylamino}-ethyl)-phosphonic acid diethyl ester (15 mg, 0.024 mmol) in acetonitrile (0.5 mL) was treated with TMSBr (31 μL, 0.24 mmol) and 2,6-lutidine (28 μL, 0.24 mmol). The solution was stirred at ambient temperature for 1 hour, when it was quenched with methanol. The solvent was removed under reduced pressure and the residue was purified by RP HPLC using a C18 column with a gradient of H2O, 0.1% TFA-acetonitrile, 0.1% TFA to provide 11 mg of the product (93%) as a white solid. 1H NMR (300 MHz, CD3OD) δ 1.89 (s, 3H), 2.03-2.15 (m, 2H), 2.14 (s, 3H), 3.30-3.47 (m, 2H), 3.50 (br s, 2H), 3.62 (br s, 2H), 3.79 (s, 3H), 4.28 (s, 2H), 5.23 (s, 2H), 5.76 (br s, 1H), 7.46 (br s, 5H) ppm; 31P (121.4 MHz, CDCl3) δ 20.1 ppm; MS (m/z) 476.3 [M+H]+, 498.3 [M+Na]+.

Workup

  1. customwhen it was quenched with methanol
  2. customThe solvent was removed under reduced pressure
  3. customthe residue was purified by RP HPLC

Sources & evidence

ORD record
ord-c5fc14ebf054410082e83483e7218b4b
Source dataset
uspto-grants-2008_09
Patent number
US07427636B2

Reaction notes

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