1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → Tricyclo[3.3.1.13,7]dec-2-yl (+/-)-[1-(1H-indol-3-ylmethyl)-1-methyl-2-[[2-(1-methyl-1H-pyrrol-2-yl) ethyl]amino]-2-oxoethyl]carbamate

HRID 1198078Notes

Reaction equation

HRID 1198078 reaction equation
[CH:1]12[CH2:10][CH:5]3[CH2:6][CH:7]([CH2:9][CH:3]([CH2:4]3)[CH:2]1[O:11][C:12]([NH:14][C:15]([CH3:29])([C:26](O)=[O:27])[CH2:16][C:17]1[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[NH:19][CH:18]=1)=[O:13])[CH2:8]2.ON1C2C=CC=CC=2N=N1.CN(C)CCCN=C=NCC.[NH2:51][CH2:52][CH2:53][C:54]1[N:55]([CH3:59])[CH:56]=[CH:57][CH:58]=1>C(OCC)(=O)C.CN(C)C=O>[NH:19]1[C:20]2[C:25](=[CH:24][CH:23]=[CH:22][CH:21]=2)[C:17]([CH2:16][C:15]([NH:14][C:12](=[O:13])[O:11][CH:2]2[CH:1]3[CH2:10][CH:5]4[CH2:6][CH:7]([CH2:9][CH:3]2[CH2:4]4)[CH2:8]3)([CH3:29])[C:26]([NH:51][CH2:52][CH2:53][C:54]2[N:55]([CH3:59])[CH:56]=[CH:57][CH:58]=2)=[O:27])=[CH:18]1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 5650581-methyl-1H-pyrrole-2-ethylamineHCID 148025032-adamantyloxycarbonyl-alpha-methyl-DL-tryptophan

Product 1

HCID 86747497Tricyclo[3.3.1.13,7]dec-2-yl (+/-)-[1-(1H-indol-3-ylmethyl)-1-methyl-2-[[2-(1-methyl-1H-pyrrol-2-yl) ethyl]amino]-2-oxoethyl]carbamate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent2×

Procedure

To a solution of 2-adamantyloxycarbonyl-α-methyl-DL-tryptophan (0.401 g, 1.01 mmol) in dry ethyl acetate (4 mL) and N,N-dimethylformamide (4 mL) under nitrogen atmosphere was added 1-hydroxybenzotriazole (0.139 g, 1.03 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (0.199 g, 1.40 mmol). This mixture was stirred 2 hours and 0.16 g (1.3 mmole) of 2-(2-aminoethyl)-1-methylpyrrole was added. After stirring an additional 18 hours, the resulting mixture was diluted with ethyl acetate (20 mL), and washed with aqueous 1N citric acid, saturated aqueous sodium bicarbonate, and brine solutions. The organic phase was dried over MgSO4 and purified by flash chromatography (SiO2, 4×20 cm, 230-400 mesh, 67% ethyl acetate/hexane eluant). Concentration followed by drying under vacuum for 48 hours at 60° C. provided 0.301 g (59%) at product; 1H NMR (CDCl3) δ 1.49-1.60 (2H, m), 1.56 (3H, s), 1.70-2.00 (12H, m), 2.61 (2H, t, J 7 Hz), 3.23-3.55 (4H, m), 3.50 (3H, s), 4.82 (1H, br s), 5.20 (1H, br s), 5.76 (1H, br s), 6.00 (1H, t, J 3Hz), 6.34 (1H, br s), 6.53 (1H, br s), 6.97 (1H, br s), 7.09-7.19 (2H, m), 7.36 (1H, d, J 8 Hz), 7.59 (1H, d, J 8 Hz), 8.16 (1H, br s).

Workup

  1. stirringAfter stirring an additional 18 hours
  2. washwashed with aqueous 1N citric acid, saturated aqueous sodium bicarbonate, and brine solutions
  3. dry with materialThe organic phase was dried over MgSO4
  4. custompurified by flash chromatography (SiO2, 4×20 cm, 230-400 mesh, 67% ethyl acetate/hexane eluant)
  5. concentrationConcentration
  6. customby drying under vacuum for 48 hours at 60° C.
  7. customprovided 0.301 g (59%) at product

Sources & evidence

ORD record
ord-0d05d632ef0941aabbc98d2125e1b137
Source dataset
uspto-grants-1994_01
Patent number
US05278316

Reaction notes

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