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

HRID 272171
Notes
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Reaction equation

HRID 272171 reaction equation
C([O:3][P:4]([CH2:9][CH2:10][N:11]([S:37]([CH3:40])(=[O:39])=[O: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.Cl>C(#N)C.CCOC(C)=O>[OH:29][C:17]1[C:16]([CH2:15][CH:14]=[C:13]([CH3:36])[CH2:12][N:11]([S:37]([CH3:40])(=[O:38])=[O:39])[CH2:10][CH2:9][P:4](=[O:3])([OH:8])[OH:5])=[C:24]([O:25][CH3:26])[C:23]([CH3:27])=[C:22]2[C:18]=1[C:19](=[O:28])[O:20][CH2:21]2
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 79372,6-LutidineHCID 76113BromotrimethylsilaneHCID 76541030[2-(Methanesulfonyl-{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

Product 1

HCID 67011096
(2-{[4-(4-Hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-isobenzofuran-5-yl)-2-methyl-but-2-enyl]-methanesulfonyl-amino}-ethyl)-phosphonic Acid
Yield 73.7%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of [2-(methanesulfonyl-{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 (18 mg, 0.029 mmol) in acetonitrile (0.5 mL) was stirred with TMSBr (38 μL, 0.29 mmol) and 2,6-lutidine (34 μL, 0.29 mmol) for 2 hours at room temperature. The reaction was worked up by addition of EtOAc and aqueous 1N HCl. The organic layer was washed with brine and the solvent was removed in vacuo. The residue was suspended in a solution of 10% TFA-CH2Cl2 for 10 minutes before it was dried to provide 9.9 mg of the desired product (73%) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ 1.76 (s, 3H), 1.76-1.88 (m, 2H), 2.10 (s, 3H), 2.87 (s, 3H), 3.24-3.35 (m, 2H), 3.39 (d, 2H, J=7 Hz), 3.65 (s, 2H), 3.75 (s, 3H), 5.22 (s, 2H), 5.41-5.48 (m, 1H) ppm; 31P (121.4 MHz, DMSO-d6) δ 21.4 ppm; MS (m/z) 464.1 [M+H]+.

Workup

  1. washThe organic layer was washed with brine
  2. customthe solvent was removed in vacuo
  3. customwas dried

Sources & evidence

ORD record
ord-75c2893e064d410bada58ddbe5cd048a
Source dataset
uspto-grants-2008_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07452901B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes