Diethyl Ether → Tert-butyl 2-{[2-(tritylamino)ethyl]amino}ethylcarbamate

HRID 459608

Reaction equation

HRID 459608 reaction equation
[NH2:1][CH2:2][CH2:3][NH:4][C:5](=[O:11])[O:6][C:7]([CH3:10])([CH3:9])[CH3:8].C(=O)([O-])[O-].[Na+].[Na+].Br[CH2:19][CH2:20][NH:21][C:22]([C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)([C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(OCC)C>C(Cl)(Cl)Cl.CCCCCC>[C:22]([NH:21][CH2:20][CH2:19][NH:1][CH2:2][CH2:3][NH:4][C:5](=[O:11])[O:6][C:7]([CH3:8])([CH3:10])[CH3:9])([C:29]1[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=1)([C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

Participants

7

Reactant 4

HCID 3283Diethyl EtherHCID 10340Sodium CarbonateHCID 187201N-BOC-ethylenediamineHCID 15718287(2-Bromoethyl)tritylamine

Product 1

HCID 18442413Tert-butyl 2-{[2-(tritylamino)ethyl]amino}ethylcarbamateYield 41.8%

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 8058HexaneSolvent

Procedure

To a solution of tert-butyl 2-aminoethylcarbamate (4.81 g) in dehydrated chloroform (10 ml) were added sodium carbonate (1.06 g) and N-(2-bromoethyl)tritylamine (3.66 g), and the mixture was stirred under reflux for 3 hours. To the reaction mixture were added diethyl ether and hexane, and the solution was washed with water. The mixture was extracted with 5% aqueous citric acid solution, and the aqueous layer was washed with diethyl ether. The aqueous layer was then made alkaline with sodium hydrogencarbonate followed by extraction with diethyl ether. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give tert-butyl 2-{[2-(tritylamino)ethyl]amino}ethylcarbamate (1.86 g) as a viscous oil.

Workup

  1. temperatureunder reflux for 3 hours
  2. washthe solution was washed with water
  3. extractionThe mixture was extracted with 5% aqueous citric acid solution
  4. washthe aqueous layer was washed with diethyl ether
  5. extractionfollowed by extraction with diethyl ether
  6. washThe organic layer was washed with brine
  7. dry with materialdried over anhydrous sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-f7d27343a9094619b1ae392f183741ec
Source dataset
uspto-grants-2007_03
Patent number
US07192943B2

Linked notes

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