2-[Hydroxy-(2-{4-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enylamino}-ethyl)-phosphinoyloxy]-propionic acid ethyl ester → 2-(Hydroxy-{2-[4-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enylamino]-ethyl}-phosphinoyloxy)-propionic Acid

HRID 540697Notes

Reaction equation

HRID 540697 reaction equation
C([O:3][C:4](=[O:39])[CH:5]([O:7][P:8]([OH:38])([CH2:10][CH2:11][NH:12][CH2:13][C:14]([CH3:37])=[CH:15][CH2:16][C:17]1[C:18]([O:30]CC[Si](C)(C)C)=[C:19]2[C:23](=[C:24]([CH3:28])[C:25]=1[O:26][CH3:27])[CH2:22][O:21][C:20]2=[O:29])=[O:9])[CH3:6])C>C(O)(C(F)(F)F)=O.C(Cl)Cl>[OH:38][P:8]([CH2:10][CH2:11][NH:12][CH2:13][C:14]([CH3:37])=[CH:15][CH2:16][C:17]1[C:18]([OH:30])=[C:19]2[C:23](=[C:24]([CH3:28])[C:25]=1[O:26][CH3:27])[CH2:22][O:21][C:20]2=[O:29])([O:7][CH:5]([CH3:6])[C:4]([OH:39])=[O:3])=[O:9]

Participants

3

Reactant 1

HCID 765410322-[Hydroxy-(2-{4-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enylamino}-ethyl)-phosphinoyloxy]-propionic acid ethyl ester

Product 1

HCID 725636812-(Hydroxy-{2-[4-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enylamino]-ethyl}-phosphinoyloxy)-propionic AcidYield 57.2%

Reagents, catalysts & solvents 1

HCID 21863450Trifluoroacetic acid methylene chlorideSolvent

Procedure

A solution of 2-[hydroxy-(2-{4-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-2-methyl-but-2-enylamino}-ethyl)-phosphinoyloxy]-propionic acid ethyl ester (15 mg, 0.026 mmol) in 10% TFA-CH2Cl2 (1 mL) was stirred at ambient temperature for 10 minutes. The reaction was worked up by removal of the solvent. The residue was dissolved in THF (0.5 mL) and water (0.4 mL) and 1N aqueous NaOH solution (0.1 mL) was added. The solution was stirred at room temperature for 20 minutes when it was acidified with 1N aqueous HCl solution. The resulting solution was purified by RP HPLC using a C18 column with a gradient of H2O, 0.1% TFA-acetonitrile, 0.1% TFA to provide 6.8 mg of the product as a white solid. 1H NMR (300 MHz, CDCl3) δ 1.38 (d, 3H, J=7 Hz), 1.91 (s, 3H), 2.13 (s, 3H), 2.12-2.28 (m, 2H), 3.12-3.33 (m, 2H), 3.41 (d, 2H, J=6 Hz), 3.56 (br s, 2H), 3.75 (s, 3H), 4.71-4.88 (m, 1H), 5.16 (s, 2H), 5.58-5.71 (m, 1H), 7.88 (br s, 3H), 8.60 (br s, 1H), 8.78 (br s, 1H) ppm; 31P (121.4 MHz, CDCl3) δ 22.0 ppm; MS (m/z) 458.3 [M+H]+, 480.3 [M+Na]+.

Workup

  1. customThe reaction was worked up by removal of the solvent
  2. dissolutionThe residue was dissolved in THF (0.5 mL)
  3. additionwater (0.4 mL) and 1N aqueous NaOH solution (0.1 mL) was added
  4. customThe resulting solution was purified by RP HPLC

Sources & evidence

ORD record
ord-f2e2224731fa4f77a3c449526c66df80
Source dataset
uspto-grants-2014_10
Patent number
US08871785B2

Reaction notes

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