Sodium;3-oxidodioxaborirane;tetrahydrate → HCID 68820644, compound

HRID 900344Notes

Reaction equation

HRID 900344 reaction equation
B1([O-])OO1.[OH2:5].O.O.O.[Na+].[C:10]([O:14][C:15]([C@H:17]([CH2:21][S:22][CH2:23][C:24]1[CH:29]=[CH:28][C:27]([C:30]2[CH:35]=[CH:34][C:33]([C:36]3[C:41]4[O:42][C:43]5[CH:48]=[CH:47][CH:46]=[CH:45][C:44]=5[C:40]=4[CH:39]=[CH:38][CH:37]=3)=[CH:32][CH:31]=2)=[CH:26][CH:25]=1)[C:18]([OH:20])=[O:19])=[O:16])([CH3:13])([CH3:12])[CH3:11]>C(O)(=O)C.C(OCC)(=O)C>[C:10]([O:14][C:15]([C@H:17]([CH2:21][S:22]([CH2:23][C:24]1[CH:25]=[CH:26][C:27]([C:30]2[CH:35]=[CH:34][C:33]([C:36]3[C:41]4[O:42][C:43]5[CH:48]=[CH:47][CH:46]=[CH:45][C:44]=5[C:40]=4[CH:39]=[CH:38][CH:37]=3)=[CH:32][CH:31]=2)=[CH:28][CH:29]=1)=[O:5])[C:18]([OH:20])=[O:19])=[O:16])([CH3:13])([CH3:11])[CH3:12]

Participants

5

Reactant 2

HCID 23693097Sodium;3-oxidodioxaborirane;tetrahydrateHCID 68818026HCID 68818026, compound

Product 1

HCID 68820644HCID 68820644, compound

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
40 °C

Procedure

Sodium perborate tetrahydrate (42 mg, 0.27 mmol) was added as a solid to a stirred solution of (2R)-2-tert-Butoxycarbonyl-3-(4′-dibenzofuran-4-yl-biphenyl-4-ylmethyl-sulfanyl)-propionic acid (150 mg, 0.27 mmol), in acetic acid (5 mL) at 40° C. This solution was stirred at 40° C. for 1 hour (HPLC control) and then diluted with ethyl acetate (50 mL), washed with water, brine (2×), dried over anhydrous MgSO4, filtered and concentrated in vacuo. Purification by trituration of the product with diethyl ether afforded the title compound as a 1:1 mix of diastereoisomers as a white solid (144 mg, 93%): Rf 0.25 (20% methanol in dichloromethane). 1H NMR (DMSO-d6, 300 MHz) δ 8.19 (1H, d, J=8 Hz, Ar—H), 8.15 (1H, dd, J=8, 1 Hz, Ar—H), 8.01 (2H, d, J=9 Hz, Ar—H), 7.87 (2H, d, J=9 Hz, Ar—H), 7.78 (4H, m, Ar—H), 7.52 (2H, m, Ar—H), 7.44 (4H, m, Ar—H, NH), 4.39 (1H, m, CHN), 4.05-4.27 (2H, m, PhCH2), 3.04 (1H, m, CHHCHN), 2.92 (1H, m, CHHCHN), 1.39 and 1.37 (both 4.5H, s, CMe3 diastereomers); ESI-LCMS e/z calcd for C33H31NO6S 569.675, found 570 (M+H)+, 592 (M+Na)+.

Workup

  1. washwashed with water, brine (2×)
  2. dry with materialdried over anhydrous MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customPurification by trituration of the product with diethyl ether

Sources & evidence

ORD record
ord-ad60c4d178274b4987f6d162601b4f85
Source dataset
uspto-grants-2008_04
Patent number
US07358248B2

Reaction notes

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