Acetone → HCID 59352169, compound

HRID 2385415Notes

Reaction equation

HRID 2385415 reaction equation
[NH:1]1[CH2:6][CH2:5][CH:4]([CH2:7][N:8]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10]3([CH2:20][O:19][C:18]4[CH:21]=[C:22]5[C:26](=[CH:27][C:17]3=4)[CH2:25][CH2:24][O:23]5)[C:9]2=[O:28])[CH2:3][CH2:2]1.[CH3:29][C:30]([CH3:32])=O.C([BH3-])#N.[Na+]>C(O)(=O)C.CO.C(=O)(O)[O-].[Na+]>[CH3:29][CH:30]([N:1]1[CH2:6][CH2:5][CH:4]([CH2:7][N:8]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10]3([CH2:20][O:19][C:18]4[CH:21]=[C:22]5[C:26](=[CH:27][C:17]3=4)[CH2:25][CH2:24][O:23]5)[C:9]2=[O:28])[CH2:3][CH2:2]1)[CH3:32]

Participants

7

Reactant 3

HCID 180AcetoneHCID 5003444Sodium cyanoborohydrideHCID 59352502HCID 59352502, compound

Product 1

HCID 59352169HCID 59352169, compoundYield 65.2%

Reagents, catalysts & solvents 3

HCID 176Acetic AcidCatalystHCID 887MethanolSolventHCID 516892Sodium BicarbonateSolvent

Conditions

Temperature
60 °C

Procedure

A solution of 1′-(piperidin-4-ylmethyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3′-indol]-2′(1′H)-one (0.29 g, 0.77 mmol), acetone (0.10 mL, 1.4 mmol), sodium cyanoborohydride (0.10 g, 1.51 mmol) and acetic acid (6 drops) in methanol (4 mL), sealed in a well-stoppered round-bottomed flask, was stirred at 60° C. for 16 h. The reaction was cooled, diluted with saturated aqueous sodium bicarbonate (30 mL) and extracted with dichloromethane (3×25 mL). The organic solution was dried over sodium sulfate, filtered and concentrated under reduced pressure. Purification by flash column chromatography with dichloromethane/methanol (14:1) afforded 1′-{[1-(1-methylethyl)piperidin-4-yl]methyl}-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one (0.21 g, 64%) as a colorless foam: 1H NMR (300 MHz, CD3OD) δ 7.33 (ddd, J=7.8, 7.5, 0.9 Hz, 1H), 7.14-7.05 (m, 3H), 6.44 (s, 1H), 6.32 (s, 1H), 4.81 (d, J=9.2 Hz, 1H), 4.65 (d, J=9.2 Hz, 1H), 4.99 (t, J=8.7 Hz, 2H), 3.74 (dd, J=14.0, 7.2 Hz, 1H), 3.65 (dd, J=14.0, 7.1 Hz, 1H), 3.02-2.91 (m, 4H), 2.77 (septet, J=6.6 Hz, 1H), 2.30-2.18 (m, 2H), 2.00-1.84 (m, 1H), 1.81-1.71 (m, 2H), 1.50-1.34 (m, 2H), 1.08 (d, J=6.6 Hz, 6H); 13C NMR (75 MHz, CD3OD) δ180.3, 163.2, 162.9, 144.1, 134.1, 123.0, 124.8, 124.6, 121.6, 121.4, 120.0, 110.5, 93.7, 81.7, 73.5, 59.2, 56.2, 49.5, 49.4, 46.6, 36.0, 30.7 (2C), 29.9, 18.3, 18.3; MS (ES+) m/z 419.2 (M+1).

Workup

  1. temperatureThe reaction was cooled
  2. extractionextracted with dichloromethane (3×25 mL)
  3. dry with materialThe organic solution was dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customPurification by flash column chromatography with dichloromethane/methanol (14:1)

Sources & evidence

ORD record
ord-f517215ffdcc41b78ded12703bf7776c
Source dataset
uspto-grants-2012_09
Patent number
US08263606B2

Reaction notes

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