1,5-Dibromopentane → 1'-(2-piperidin-1-ylethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

HRID 645260Notes

Reaction equation

HRID 645260 reaction equation
[NH2:1][CH2:2][CH2:3][N:4]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[C:6]2([C:16]3=[CH:17][C:18]4[O:22][CH2:21][O:20][C:19]=4[CH:23]=[C:15]3[O:14][CH2:13]2)[C:5]1=[O:24].Br[CH2:26][CH2:27][CH2:28][CH2:29][CH2:30]Br.C(N(CC)CC)C>C1COCC1>[N:1]1([CH2:2][CH2:3][N:4]2[C:12]3[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=3)[C:6]3([C:16]4=[CH:17][C:18]5[O:22][CH2:21][O:20][C:19]=5[CH:23]=[C:15]4[O:14][CH2:13]3)[C:5]2=[O:24])[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]1

Participants

5

Reactant 3

HCID 81001,5-DibromopentaneHCID 8471TriethylamineHCID 592633311'-(2-aminoethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

Product 1

HCID 592634551'-(2-piperidin-1-ylethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 1′-(2-aminoethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one (0.20 g, 0.62 mmol), 1,5-dibromopentane (0.08 mL, 0.62 mmol) and triethyl amine (0.17 mL, 1.23 mmol) in THF (10.0 mL) was refluxed for 15 hrs and concentrated in vacuo to dryness. The residue was subjected to flash chromatography eluting with 10% methanol in ethyl acetate to give 1′-(2-piperidin-1-ylethyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one, which was treated with 4.0 M HCl in dioxane to give the title compound (28%): mp>240° C.; 1H NMR (300 MHz, CD3OD) δ 7.40 (t, 1H), 7.27-7.11 (m, 3H), 6.51 (s, 1H), 6.17 (s, 1H), 5.86 (s, 2H), 4.91 (d, 1H), 4.71 (d, 1H), 4.40-4.13 (m, 2H), 3.95-3.84 (m, 1H), 3.66-3.37 (m, 3H), 3.14-2.96 (m, 2H), 2.06-1.45 (m, 6H); 13C NMR (75 MHz, CD3OD) δ 180.4, 157.5, 150.5, 143.8, 142.5, 133.9, 130.3, 125.3, 125.1, 120.6, 110.2, 103.9, 102.9, 94.2, 81.4, 59.7, 55.4, 54.9, 53.9, 36.4, 24.2, 22.6; MS (ES+) m/z 393 (M+1).

Workup

  1. temperaturewas refluxed for 15 hrs
  2. concentrationconcentrated in vacuo to dryness
  3. washeluting with 10% methanol in ethyl acetate

Sources & evidence

ORD record
ord-50f6d97b43944c51ac50ee3334d65d33
Source dataset
uspto-grants-2010_04
Patent number
US07700641B2

Reaction notes

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