Hydrogen Peroxide → HCID 60206841, compound

HRID 1296100Notes

Reaction equation

HRID 1296100 reaction equation
CC1(C)C(C)(C)OB([C:9]2[CH:10]=[C:11]3[C:16](=[CH:17][CH:18]=2)[O:15][CH2:14][CH2:13][C@@H:12]3[NH:19][C:20](=[O:26])[O:21][C:22]([CH3:25])([CH3:24])[CH3:23])O1.[OH-:28].[Na+].OO>O1CCCC1>[OH:28][C:9]1[CH:10]=[C:11]2[C:16](=[CH:17][CH:18]=1)[O:15][CH2:14][CH2:13][C@@H:12]2[NH:19][C:20](=[O:26])[O:21][C:22]([CH3:25])([CH3:24])[CH3:23]

Participants

5

Reactant 3

HCID 784Hydrogen PeroxideHCID 14798Sodium HydroxideHCID 58909335HCID 58909335, compound

Product 1

HCID 60206841HCID 60206841, compoundYield 85%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of tert-butyl (4S)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-chromen-4-ylcarbamate (1.09 g, 2.90 mmol) in tetrahydrofuran (10 mL) was added sodium hydroxide (6 mL, 1 N, 6 mmol) followed by hydrogen peroxide (10 mL, 30%). The reaction mixture was stirred at room temperature for 2 h and then quenched with sodium hydrogen sulfite (5 g in 10 mL of water). The mixture was adjusted to pH 4 with 2 N sodium hydroxide and then extracted with ethyl acetate (3×50 mL). The combined extracts were washed with saturated sodium chloride, dried (sodium sulfate), filtered, and concentrated under reduced pressure. Flash chromatography (silica gel, 10–25% ethyl acetate/hexanes) provided (650 mg, 85%) of the desired product. 1H NMR (300 MHz, CDCl3) δ 7.89 (s, 1H), 6.75 (d, J=2.7 Hz, 1H), 6.72–6.63 (m, 1H), 5.03 (d, J=7.5 Hz, 1H), 4.77–4.75 (m, 1H), 4.16–4.08 (m, 2H), 2.30 (s, 1H), 2.16–2.13 (m, 1H), 2.05–1.99 (m, 1H), 1.47 (s, 9H).

Workup

  1. customquenched with sodium hydrogen sulfite (5 g in 10 mL of water)
  2. extractionextracted with ethyl acetate (3×50 mL)
  3. washThe combined extracts were washed with saturated sodium chloride
  4. dry with materialdried (sodium sulfate)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-9de2d12341df4f64b35b1047e2c22be5
Source dataset
uspto-grants-2007_07
Patent number
US07244725B2

Reaction notes

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