Sodium;3-oxidodioxaborirane;tetrahydrate → HCID 68820183, compound

HRID 900345Notes

Reaction equation

HRID 900345 reaction equation
B1([O-])OO1.[OH2:5].[OH2:6].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:6])=[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 68820183HCID 68820183, compoundYield 89.6%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
40 °C

Procedure

Sodium perborate tetrahydrate (105 mg, 0.68 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 (10 mL) at 50° C. This solution was stirred at 40° C. for 2 hours (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 white solid (138 mg, 87%): Rf 0.5 (20% methanol in dichloromethane). 1H NMR (MeOH-d4, 300 MHz): δ 7.90 (4H, m, Ar—H), 7.70 (4H, m, Ar—H), 7.53 (2H, m, Ar—H), 7.29-7.49 (5H, m, Ar—H), 4.62 (1H, m, CHN) 4.41 (2H, s, PhCH2S), 3.42 (2H, m, CH2CHN), 1.46 (9H, s, CMe3); ESI-LCMS e/z calcd for C33H31NO7S 585.674, found 586 (M+H)+, 608 (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-9ffc0c9a5ee9491dbfa9527a64dd3c47
Source dataset
uspto-grants-2008_04
Patent number
US07358248B2

Reaction notes

Loading…