N-Hydroxysuccinimide → (S)-2-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1H-indol-3-yl)propanamido)-3-(tert-butyldisulfanyl)propanoic acid

HRID 1482291Notes

Reaction equation

HRID 1482291 reaction equation
[CH:1]1[C:13]2[CH:12]([CH2:14][O:15][C:16]([NH:18][C@@H:19]([CH2:23][C:24]3[C:32]4[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=4)[NH:26][CH:25]=3)[C:20](O)=[O:21])=[O:17])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.ON1C(=O)CCC1=O.Cl.C(N=C=NCCCN(C)C)C.C(N(C(C)C)C(C)C)C.[NH2:62][C@H:63]([CH2:67][S:68][S:69][C:70]([CH3:73])([CH3:72])[CH3:71])[C:64]([OH:66])=[O:65]>C(Cl)Cl>[CH:10]1[C:11]2[CH:12]([CH2:14][O:15][C:16]([NH:18][C@@H:19]([CH2:23][C:24]3[C:32]4[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=4)[NH:26][CH:25]=3)[C:20]([NH:62][C@H:63]([CH2:67][S:68][S:69][C:70]([CH3:73])([CH3:72])[CH3:71])[C:64]([OH:66])=[O:65])=[O:21])=[O:17])[C:13]3[C:5](=[CH:4][CH:3]=[CH:2][CH:1]=3)[C:6]=2[CH:7]=[CH:8][CH:9]=1

Participants

7

Reactant 5

HCID 80170N-HydroxysuccinimideHCID 81531DiisopropylethylamineHCID 462948(S)-2-amino-3-(tert-butyldisulfanyl)propanoic acidHCID 978343Fmoc-L-tryptophanHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

Product 1

HCID 117735898(S)-2-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1H-indol-3-yl)propanamido)-3-(tert-butyldisulfanyl)propanoic acid

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(1H-indol-3-yl)propanoic acid (Fmoc-Trp-OH) (1.26 g, 2.96 mmol) and N-hydroxysuccinimide (341 mg, 2.96 mmol) in methylene chloride (5.9 mL) were mixed with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (WSCI.HCl) (568 mg, 2.96 mmol) at 0° C., and the reaction solution was stirred at room temperature for 16 hours. N-Ethyl-N-isopropyl propane 2-amine (DIPEA, 517 μL, 2.96 mmol) and (S)-2-amino-3-(tert-butyldisulfanyl)propanoic acid (H-D-Cys(StBu)-0H) (Compound SP641) (620 mg, 2.96 mmol) were then mixed at 0° C., and the reaction solution was stirred at room temperature for 5 hours. After washing with 1 N hydrochloric acid, the organic layer was extracted with ethyl acetate, and the resulting organic layer was washed with a saturated aqueous sodium chloride solution and then dried over sodium sulfate. Following concentration under reduced pressure, the resulting residue was crude purified by reverse-phase silica gel column chromatography (0.1% aqueous formic acid solution/0.1% formic acid-acetonitrile solution) to afford (S)-2-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1H-indol-3-yl)propanamido)-3-(tert-butyldisulfanyl)propanoic acid (Fmoc-Trp-D-Cys(StBu)-OH) (Compound SP642).

Workup

  1. stirringthe reaction solution was stirred at room temperature for 5 hours
  2. washAfter washing with 1 N hydrochloric acid
  3. extractionthe organic layer was extracted with ethyl acetate
  4. washthe resulting organic layer was washed with a saturated aqueous sodium chloride solution
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentration under reduced pressure
  7. custompurified by reverse-phase silica gel column chromatography (0.1% aqueous formic acid solution/0.1% formic acid-acetonitrile solution)

Sources & evidence

ORD record
ord-539c61a63c5d4dcf8ce4dd87fcd0e838
Source dataset
uspto-grants-2016_08
Patent number
US09409952B2

Reaction notes

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