Epichlorohydrin → HCID 76554795, compound

HRID 1868582Notes

Reaction equation

HRID 1868582 reaction equation
[CH2:1]([O:8][C:9]1[CH:10]=[C:11]([CH:24]=[C:25]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:26]=1)[C:12]1[O:13][C:14]2[C:19]([C:20](=[O:22])[CH:21]=1)=[CH:18][CH:17]=[C:16]([OH:23])[CH:15]=2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH2:37]([CH:39]1[O:41][CH2:40]1)Cl>CN(C)C=O>[CH2:28]([O:27][C:25]1[CH:24]=[C:11]([CH:10]=[C:9]([O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH:26]=1)[C:12]1[O:13][C:14]2[C:19]([C:20](=[O:22])[CH:21]=1)=[CH:18][CH:17]=[C:16]([O:23][CH2:37][CH:39]1[O:41][CH2:40]1)[CH:15]=2)[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1

Participants

5

Reactant 3

HCID 7835EpichlorohydrinHCID 24758Sodium hydrideHCID 58209852HCID 58209852, compound2×

Product 1

HCID 76554795HCID 76554795, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a well-stirred solution of 3′,5′-dibenzyloxy-7-hydroxy-flavone, 22 (8 g, 17.8 mmol) in dry dimethyl formamide (200 mL) was added 50% sodium hydride (3 g, 125 mmol) at 0-5° C. and after 30 minutes, excess of epichlorohydrin (8.3 mL, 107 mmol) was added and stirred at room temperature for overnight. The reaction mixture was concentrated under reduced pressure, diluted with water and extracted with chloroform. The combined organic layers were dried over sodium sulphate, filtered and evaporated to dryness. The crude product was purified by column chromatography to afford 28. Yield 7.1 g (79%); mp 172-173° C.; MS (FAB) 507 (M++1); IR (KBr) 1640; 1H NMR (200 MHz, CDCl3) δ 8.13 (d, J=8.7 Hz, 1H), 7.47-7.34 (m, 10H), 7.11 (d, J=2.2 Hz, 2H), 7.00 (dd, J=10.9 Hz, 2.1 Hz, 1H), 6.97 (d, J=1.9 Hz, 1H), 6.77 (d, J=2.0 Hz, 1H), 6.69 (s, 3H), 5.10 (s, 4H), 4.38 (dd, J=11.1 Hz, 2.8 Hz, 1H), 4.04 (dd, J=11.1 Hz, 5.8 Hz, 1H), 3.41-3.40 (m, 1H), 2.95 (t, J=4.5 Hz, 4.5 Hz, 1H), 2.80 (dd, J=4.8 Hz, 2.6 Hz, 1H); 13C NMR δ 177.9, 163.8, 162.9, 160.7, 158.1, 136.7, 133.9, 129.1, 128.6, 127.9, 127.5, 118.2, 115.1, 108.1, 106.0, 105.4, 101.7, 70.8, 69.7, 50.2, 44.9.

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. additiondiluted with water
  3. extractionextracted with chloroform
  4. dry with materialThe combined organic layers were dried over sodium sulphate
  5. filtrationfiltered
  6. customevaporated to dryness
  7. customThe crude product was purified by column chromatography

Sources & evidence

ORD record
ord-8deacf4f0b444a62862f69962af05fdc
Source dataset
uspto-grants-2009_12
Patent number
US07635779B2

Reaction notes

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