Bromotrimethylsilane → {2-[2-Ethyl-4-(6-ethyl-4-hydroxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-but-2-enylamino]-ethyl}-phosphonic acid

HRID 33677Notes

Reaction equation

HRID 33677 reaction equation
C([O:3][P:4]([CH2:9][CH2:10][NH:11][CH2:12][C:13]([CH2:36][CH3:37])=[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[CH2:25][CH3:26])[CH2:21][O:20][C:19]2=[O:28])(=[O:8])[O:5]CC)C.C[Si](Br)(C)C>CN(C=O)C.C(Cl)Cl>[CH2:36]([C:13](=[CH:14][CH2:15][C:16]1[C:17]([OH:29])=[C:18]2[C:22](=[C:23]([CH3:27])[C:24]=1[CH2:25][CH3:26])[CH2:21][O:20][C:19]2=[O:28])[CH2:12][NH:11][CH2:10][CH2:9][P:4](=[O:3])([OH:8])[OH:5])[CH3:37]

Participants

5

Reactant 2

HCID 76113BromotrimethylsilaneHCID 72563629(2-{2-Ethyl-4-[6-ethyl-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-but-2-enyl amino}-ethyl)-phosphonic acid diethyl ester

Product 1

HCID 67010234{2-[2-Ethyl-4-(6-ethyl-4-hydroxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-but-2-enylamino]-ethyl}-phosphonic acidYield 44.7%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

(2-{2-Ethyl-4-[6-ethyl-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-but-2-enylamino}-ethyl)-phosphonic acid diethyl ester (24.9 mg, 0.045 mmol) was dissolved in DMF (0.5 mL) and DCM (0.5 mL). Trimethylsilyl bromide (68.7 mg, 0.449 mmol) was added and the reaction was stirred at room temperature. After 20 hrs the reaction was quenched with MeOH (0.15 mL). The solvents were evaporated in vacuo and the crude material was purified by RP-HPLC (eluent: water/MeCN). The product-containing fractions were combined and lyophilized to yield 8.0 mg of the free phosphonic acid [MS: 498 M++1].

Workup

  1. customAfter 20 hrs the reaction was quenched with MeOH (0.15 mL)
  2. customThe solvents were evaporated in vacuo
  3. customthe crude material was purified by RP-HPLC (eluent: water/MeCN)

Sources & evidence

ORD record
ord-964c870abae14724b4484c22e157993d
Source dataset
uspto-grants-2008_09
Patent number
US07429565B2

Reaction notes

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