Ethyl bromoacetate → Ethyl(2'-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-1'(2'h)-yl)acetate

HRID 425631Notes

Reaction equation

HRID 425631 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]2([CH2:13][O:12][C:11]3[CH:14]=[C:15]4[C:19](=[CH:20][C:10]2=3)[CH2:18][CH2:17][O:16]4)[C:2]1=[O:21].Br[CH2:23][C:24]([O:26][CH2:27][CH3:28])=[O:25].C(=O)([O-])[O-].[Cs+].[Cs+]>CC(C)=O>[O:21]=[C:2]1[C:3]2([CH2:13][O:12][C:11]3[CH:14]=[C:15]4[C:19](=[CH:20][C:10]2=3)[CH2:18][CH2:17][O:16]4)[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[N:1]1[CH2:23][C:24]([O:26][CH2:27][CH3:28])=[O:25]

Participants

5

Reactant 3

HCID 7748Ethyl bromoacetateHCID 10796Cesium carbonateHCID 592633545,6-dihydro-2H-spiro[benzofuro[6,5-b]furan-3,3'-indolin]-2'-one

Product 1

HCID 59263427Ethyl(2'-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-1'(2'h)-yl)acetateYield 63%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A mixture of 5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]2′(1′H)-one (0.28 g, 1.00 mmol), ethyl 2-bromoacetate (0.17 g, 1.00 mmol) and cesium carbonate (0.98 g, 3.00 mmol) in acetone (20.0 mL) was stirred at reflux for 5 hours. After cooling down to ambient temperature, the mixture was filtered. The filtrate was evaporated under reduced pressure and the residue was subjected to column chromatography to give the title compound (0.23 g, 63%) as a white solid: MS (ES+) m/z 366.4 (M+1).

Workup

  1. temperatureat reflux for 5 hours
  2. filtrationthe mixture was filtered
  3. customThe filtrate was evaporated under reduced pressure

Sources & evidence

ORD record
ord-195da4d1a7b04837bb000a0c9c6c8f89
Source dataset
uspto-grants-2012_01
Patent number
US08106087B2

Reaction notes

Loading…