Nicotinic Acid → Tert-butyl 2-(2-(2-(nicotinamido)ethyl)disulfanyl)ethylcarbamate

HRID 591105Notes

Reaction equation

HRID 591105 reaction equation
[C:1]([OH:9])(=O)[C:2]1[CH:7]=[CH:6][CH:5]=[N:4][CH:3]=1.[NH2:10][CH2:11][CH2:12][S:13][S:14][CH2:15][CH2:16][NH:17][C:18](=[O:24])[O:19][C:20]([CH3:23])([CH3:22])[CH3:21].CCN=C=NCCCN(C)C>CC#N.CCOC(C)=O>[C:1]([NH:10][CH2:11][CH2:12][S:13][S:14][CH2:15][CH2:16][NH:17][C:18](=[O:24])[O:19][C:20]([CH3:22])([CH3:21])[CH3:23])(=[O:9])[C:2]1[CH:7]=[CH:6][CH:5]=[N:4][CH:3]=1

Participants

6

Reactant 3

HCID 938Nicotinic AcidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 22245556tert-butyl N-(2-((2-aminoethyl)disulfanyl)ethyl)carbamate

Product 1

HCID 86651799Tert-butyl 2-(2-(2-(nicotinamido)ethyl)disulfanyl)ethylcarbamateYield 56%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

Separately, nicotinic acid (246 mg, 2.0 mmol) was taken up in CH3CN (10 mL) along with tert-butyl 2-(2-(2-aminoethyl)disulfanyl)ethylcarbamate (503 mg, 2.0 mmol), EDCI (422 mg, 2.2 mmol). The resulting reaction mixture was stirred at room temperature for 4 h and then diluted with EtOAc. The organic layer was washed with dilute aqueous NaHCO3, brine, dried over Na2SO4, filtered and concentrated under reduced pressure. Purification by silica gel chromatography (CH2Cl2) afforded tert-butyl 2-(2-(2-(nicotinamido)ethyl)disulfanyl)ethylcarbamate (400 mg, 56%).

Workup

  1. customThe resulting reaction mixture
  2. washThe organic layer was washed with dilute aqueous NaHCO3, brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customPurification by silica gel chromatography (CH2Cl2)

Sources & evidence

ORD record
ord-031a76c598404148b7f773372b067a11
Source dataset
uspto-grants-2016_01
Patent number
US09238077B2

Reaction notes

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