1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 86584000, compound

HRID 1860485Notes

Reaction equation

HRID 1860485 reaction equation
[CH2:1]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[CH:10]=[C:9]1[C:17]([OH:19])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:20][C@H:21]([C:23]([NH:25][C@H:26]([CH:39]=[O:40])[CH2:27][C:28](=[N:34][NH:35][C:36]([NH2:38])=[O:37])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:24])[CH3:22].CCN=C=NCCCN(C)C>C(Cl)Cl.CN(C1C=CN=CC=1)C.C(OCC)(=O)C>[CH2:1]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[CH:10]=[C:9]1[C:17]([NH:20][C@H:21]([C:23]([NH:25][C@H:26]([CH:39]=[O:40])[CH2:27][C:28](=[N:34][NH:35][C:36]([NH2:38])=[O:37])[O:29][C:30]([CH3:31])([CH3:33])[CH3:32])=[O:24])[CH3:22])=[O:19])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 3

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 2614071-benzyl-1H-indole-2-carboxylic acidHCID 86584001HCID 86584001, compound

Product 1

HCID 86584000HCID 86584000, compoundYield 56.1%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

1-Benzylindole-2-carboxylic acid (477 mg, 1.9 mmol) and 3(S)-(alaninyl)amino-4-oxobutanoic acid, t-butyl ester semicarbazone (581 mg, 1.9 mmol) were dissolved in methylene chloride (8 mL) and both DMAP (232 mg, 1.9 mmol) and EDAC (498 mg, 2.6 mmol) were added to the solution under a nitrogen atmosphere at 0° C. The resultant solution was stirred for 1 hour at 0° C. and an additional 2 hours at room temperature. The reaction mixture was diluted with ethyl acetate, washed successively with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated to give a yellow foam. Flash column chromatographic purification of the foam (silica gel, methanol/methylene chloride 2-5%) afforded the title product as a white powder (570 mg, 56%). TLC: (methanol/methylene chloride: 1/9, silica gel): Rf=0.38; 1H NMR (CDCl3): δ 8.60 (bs, 1H), 7.67 (dd, J=8.0, 1.1, 1H), 7.50 (d, J=8.0, 1H), 7.33-7.01 (m, 8H), 6.79 (d, J=7.4, 1H), 5.78 (s, 2H), 4.87-4.83 (m, 1H), 4.67-4.62 (m, 1H), 2.73-2.43 (m, 2H), 1.46 (d, J=7.1, 3H), 1.39 (s, 9H).

Workup

  1. washwashed successively with saturated sodium bicarbonate solution and brine
  2. dry with materialdried over sodium sulfate
  3. concentrationconcentrated
  4. customto give a yellow foam
  5. customFlash column chromatographic purification of the foam (silica gel, methanol/methylene chloride 2-5%)

Sources & evidence

ORD record
ord-6710bd6eac074bdc9854e9080d13ef73
Source dataset
uspto-grants-2003_03
Patent number
US06531467B2

Reaction notes

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