Formaldehyde → 1-(diphenylmethyl)-3-(6-hydroxy-1,3-benzodioxol-5-yl)-3-(hydroxymethyl)-5-methyl-1,3-dihydro-2H-indol-2-one

HRID 425546Notes

Reaction equation

HRID 425546 reaction equation
[C:1]1([CH:7]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[N:8]2[C:16]3[C:11](=[CH:12][C:13]([CH3:17])=[CH:14][CH:15]=3)[CH:10]([C:18]3[C:26]([OH:27])=[CH:25][C:21]4[O:22][CH2:23][O:24][C:20]=4[CH:19]=3)[C:9]2=[O:28])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:35]=[O:36].C(NC(C)C)(C)C>ClCCl>[C:29]1([CH:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[N:8]2[C:16]3[C:11](=[CH:12][C:13]([CH3:17])=[CH:14][CH:15]=3)[C:10]([C:18]3[C:26]([OH:27])=[CH:25][C:21]4[O:22][CH2:23][O:24][C:20]=4[CH:19]=3)([CH2:35][OH:36])[C:9]2=[O:28])[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=1

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 7912DiisopropylamineHCID 120042731-(diphenylmethyl)-3-(6-hydroxy-1,3-benzodioxol-5-yl)-5-methyl-1,3-dihydro-2H-indol-2-one

Product 1

HCID 588724901-(diphenylmethyl)-3-(6-hydroxy-1,3-benzodioxol-5-yl)-3-(hydroxymethyl)-5-methyl-1,3-dihydro-2H-indol-2-oneYield 63%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 1-(diphenylmethyl)-3-(6-hydroxy-1,3-benzodioxol-5-yl)-5-methyl-1,3-dihydro-2H-indol-2-one (1.61 g, 3.60 mmol) and para-formaldehyde (0.43 g, 14.6 mmol) in dichloromethane (60.0 mL) was added diisopropylamine (7.20 mmol). After stirring at ambient temperature for 3 h, the reaction was quenched with saturated aqueous ammonium chloride (60.0 mL). The organic layer was separated and washed with water (3×100 mL), dried over sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was subjected to column chromatography eluting with ethyl acetate/hexanes (20-60%) to afford the title compound (1.07 g, 63%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ 10.09 (br, 1H), 7.37-7.16 (m, 12H), 6.99 (s, 1H), 6.87 (d, 1H), 6.62 (s, 1H) 6.54 (s, 1H), 6.37 (d, 1H), 5.87 (d, 2H), 4.45 (ABq, 2H), 2.33 (s, 3H); MS (ES+) m/z 480.4 (M+1).

Workup

  1. customthe reaction was quenched with saturated aqueous ammonium chloride (60.0 mL)
  2. customThe organic layer was separated
  3. washwashed with water (3×100 mL)
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated in vacuo to dryness
  7. washeluting with ethyl acetate/hexanes (20-60%)

Sources & evidence

ORD record
ord-ecab98f008a7447691906ddee8def779
Source dataset
uspto-grants-2012_01
Patent number
US08106087B2

Reaction notes

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