Triethylamine → N-(2-fluorophenyl)-4-[(2'-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-1'(2'H)-yl)methyl]benzamide

HRID 1965761Notes

Reaction equation

HRID 1965761 reaction equation
[F:1][C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[NH2:4].C(N(CC)CC)C.[O:16]=[C:17]1[C:25]2([C:29]3=[CH:30][C:31]4[O:32][CH2:33][CH2:34][O:35][C:36]=4[CH:37]=[C:28]3[O:27][CH2:26]2)[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:18]1[CH2:38][C:39]1[CH:47]=[CH:46][C:42]([C:43](Cl)=[O:44])=[CH:41][CH:40]=1>ClCCl>[F:1][C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[NH:4][C:43](=[O:44])[C:42]1[CH:41]=[CH:40][C:39]([CH2:38][N:18]2[C:19]3[C:24](=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:25]3([C:29]4[C:28](=[CH:37][C:36]5[O:35][CH2:34][CH2:33][O:32][C:31]=5[CH:30]=4)[O:27][CH2:26]3)[C:17]2=[O:16])=[CH:47][CH:46]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 95842-FluoroanilineHCID 866421984-((2'-oxo-3,7-dihydro-2H-spiro[benzofuro[5,6-b][1,4]dioxine-8,3'-indoline]-1'-yl)methyl)benzoyl chloride

Product 1

HCID 59352556N-(2-fluorophenyl)-4-[(2'-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-1'(2'H)-yl)methyl]benzamideYield 50.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of 4-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]benzoic acid (0.400 g, 0.93 mmol) in anhydrous chloroform (20 mL) was added thionyl chloride (0.27 mL, 3.7 mmol). The solution was heated at reflux for 2 h and concentrated in vacuo to afford 4-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]benzoyl chloride (0.45 g) as a pale yellow solid. To a solution of 2-fluoroaniline (0.1 mL, 1.0 mmol) and triethylamine (0.43 mL, 3.1 mmol) in anhydrous dichloromethane (10 mL) at 0° C. under nitrogen was added 4-((2′-oxo-3,7-dihydro-2H-spiro[benzofuro[5,6-b][1,4]dioxine-8,3′-indoline]-1′-yl)methyl)benzoyl chloride (0.46 g, 1.0 mmol). The reaction mixture was stirred at ambient temperature for 42 h and was washed with 10% w/v hydrochloric acid (10 mL), water (10 mL) and brine (10 mL). The organic phase was dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography and eluted with hexanes/ethyl acetate (1/1) to afford N-(2-fluorophenyl)-4-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]benzamide (0.262 g, 49%) as a colorless solid: mp 245-251° C.; 1H NMR (300 MHz, CDCl3) δ 8.48-8.43 (m, 1H), 8.11-8.04 (m, 1H), 7.88 (d, J=8.1 Hz, 2H), 7.46 (d, J=8.1 Hz, 2H), 7.24-7.02 (m, 6H), 6.75 (d, J=7.8 Hz, 1H), 6.52 (s, 1H), 6.24 (s, 1H), 5.16 (d, J=15.9 Hz, 1H), 4.95 (d, J=8.7 Hz, 1H), 4.89 (d, J=15.9 Hz, 1H), 4.68 (d, J=9.0 Hz, 1H), 4.21-4.10 (m, 4H); 13C NMR (75 MHz, CDCl3) δ 177.6, 164.9, 155.3, 152.7 (d, J=241.4 Hz), 144.7, 141.7, 140.0, 138.3, 134.1, 132.2, 128.8, 127.8 (d, J=4.1 Hz), 126.4 (d, J=9.8 Hz), 124.7-124.6 (m), 124.1, 123.7, 121.8, 120.8, 114.8 (d, J=19.1 Hz), 111.4, 109.1, 99.5, 80.1, 64.5, 63.9, 58.0, 43.8; MS (ES+) m/z 523.0 (M+1).

Workup

  1. washwas washed with 10% w/v hydrochloric acid (10 mL), water (10 mL) and brine (10 mL)
  2. dry with materialThe organic phase was dried over anhydrous magnesium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography
  6. washeluted with hexanes/ethyl acetate (1/1)

Sources & evidence

ORD record
ord-423e6775371e495685eddcc5f4a9b69f
Source dataset
uspto-grants-2013_04
Patent number
US08415370B2

Reaction notes

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