Acetic Anhydride → HCID 76546195, compound

HRID 32980Notes

Reaction equation

HRID 32980 reaction equation
[CH2:1]([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][CH2:30][CH2:31][Si:32]([CH3:35])([CH3:34])[CH3:33])=[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][CH2:6][CH3:7])[CH3:2].[C:37](OC(=O)C)(=[O:39])[CH3:38]>C(O)(=O)C>[CH2:1]([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][CH2:30][CH2:31][Si:32]([CH3:33])([CH3:34])[CH3:35])=[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][CH2:6][CH3:7])[CH3:2]

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 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 76546195HCID 76546195, compoundYield 81%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To 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 (32 mg, 0.059 mmol) in acetic acid (0.5 mL) was added acetic anhydride (0.5 mL). The solution was stirred at room temperature for 90 minutes when it was quenched by addition of 2 drops of water. The solution was dried in vacuo 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 28 mg of the product (81%) as a clear gel. The NMR data of this compound shows two rotamers in a ratio of 70:30. 1H NMR (300 MHz, CDCl3) δ 0.05 (s, 9H), 1.17-1.27 (m, 2H), 1.30 and 1.31 (t, 6H, J=7 Hz), 1.70-1.79 (m, 2H), 1.76 (s, 3H), 2.00 (s, 3H), 2.18 (s, 3H), 3.40-3.52 (m, 2H), 3.46 (d, 2H, J=7 Hz), 3.77 (s, 3H), 3.79 and 3.93 (s, 3H), 4.07 (pent, 4H, J=7 Hz), 4.27-4.35 (m, 2H), 5.13 (s, 2H), 5.22-5.30 (m, 1H) ppm; 31P (121.4 MHz, CDCl3) δ 27.5 and 28.9 ppm; MS (m/z) 584.1 [M+H]+, 606.2 [M+Na]+.

Workup

  1. customwas quenched by addition of 2 drops of water
  2. customThe solution was dried in vacuo
  3. customthe residue was purified by RP HPLC

Sources & evidence

ORD record
ord-b5c2b0c823b645409f8af41f32002aa3
Source dataset
uspto-grants-2008_09
Patent number
US07427636B2

Reaction notes

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