Tryptamine → 2-{[2-(1H-Indol-3-yl)-ethylamino]-methyl}-2,3,8,9-tetrahydro-7H-1,4-dioxino[2,3-e]indol-8-one

HRID 1737407Notes

Reaction equation

HRID 1737407 reaction equation
C1(C)C=CC(S(O[CH2:11][C@@H:12]2[O:25][C:16]3=[C:17]4[C:21](=[CH:22][CH:23]=[C:15]3[O:14][CH2:13]2)[NH:20][C:19](=[O:24])[CH2:18]4)(=O)=O)=CC=1.[NH2:27][CH2:28][CH2:29][C:30]1[C:38]2[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=2)[NH:32][CH:31]=1>CS(C)=O>[NH:32]1[C:33]2[C:38](=[CH:37][CH:36]=[CH:35][CH:34]=2)[C:30]([CH2:29][CH2:28][NH:27][CH2:11][CH:12]2[O:25][C:16]3=[C:17]4[C:21](=[CH:22][CH:23]=[C:15]3[O:14][CH2:13]2)[NH:20][C:19](=[O:24])[CH2:18]4)=[CH:31]1

Participants

4

Reactant 2

HCID 1150TryptamineHCID 15381104(R)-2-(Toluene-4-sulfonyloxymethyl)-2,3,8,9-tetrahydro-7H-1,4-dioxino[2,3-e]indol-8-one

Product 1

HCID 100672762-{[2-(1H-Indol-3-yl)-ethylamino]-methyl}-2,3,8,9-tetrahydro-7H-1,4-dioxino[2,3-e]indol-8-one

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
75 °C

Procedure

(R)-2-(Toluene-4-sulfonyloxymethyl)-2,3,8,9-tetrahydro-7H-1,4-dioxino[2,3-e]indol-8-one (1.2 g, 3.2 mmole) and tryptamine (1.5 g, 9.6 mmole) in DMSO (50 ml) were placed in a three-neck flask equipped with a condenser, a thermometer and a nitrogen bubbler immersed into the solution. The reaction mixture was heated at 75° C. for 5 hours, cooled to room temperature and partitioned between water and ethyl acetate. The ethyl acetate layer was separated, dried over anhydrous sodium sulfate, concentrated in vacuum and column chromatographed on silica gel using first ethyl acetate and subsequently 2.5%, 5%, 10% methanol in ethyl acetate as eluants. The free base of the desired product was obtained (0.85 g, 2.3 mmole) as an oil which was dissolved in 50 ml of ethanoldiethyl ether (1/1) solution and treated with 10.3 ml of 0.25 M of fumaric acid in ethanol. Addition of hexane gave 0.30 g of the (S) enantiomer of the title compound as an off-white solid hemi-fumarate, three quarter hydrate, m.p. 175-176° C.

Workup

  1. customequipped with a condenser
  2. temperaturecooled to room temperature
  3. custompartitioned between water and ethyl acetate
  4. customThe ethyl acetate layer was separated
  5. dry with materialdried over anhydrous sodium sulfate
  6. concentrationconcentrated in vacuum and column
  7. customchromatographed on silica gel using first ethyl acetate and subsequently 2.5%, 5%, 10% methanol in ethyl acetate as eluants

Sources & evidence

ORD record
ord-2ef95a14c8644f1b8458f416d1ae6896
Source dataset
uspto-grants-1999_10
Patent number
US05962465

Reaction notes

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