1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → tert-Butyl [(1R)-1-{[(cyclohexylmethyl)amino]carbonyl)-3-(methylthio)propyl]carbamate

HRID 2376157Notes

Reaction equation

HRID 2376157 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]([CH2:13][CH2:14][S:15][CH3:16])[C:10]([OH:12])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH:17]1([CH2:23][NH2:24])[CH2:22][CH2:21][CH2:20][CH2:19][CH2:18]1.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C>CN(C=O)C.C(OCC)(C)=O.O>[CH:17]1([CH2:23][NH:24][C:10]([C@H:9]([NH:8][C:6](=[O:7])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])[CH2:13][CH2:14][S:15][CH3:16])=[O:12])[CH2:22][CH2:21][CH2:20][CH2:19][CH2:18]1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 76688CyclohexanemethylamineHCID 111051N-(tert-Butyloxycarbonyl)-D-methionine

Product 1

HCID 86603753tert-Butyl [(1R)-1-{[(cyclohexylmethyl)amino]carbonyl)-3-(methylthio)propyl]carbamateYield 89.5%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 22728543Water ethylacetateSolvent

Procedure

A mixture of (2R)-2-[(tert-butoxycarbonyl)amino]-4-(methylthio)butanoic acid (4.57 g), cyclohexanemethylamine (2.28 g), HOBt (2.72 g), and EDCI (3.87 g) in DMF (50 mL) was stirred at ambient temperature for 15 hours. The reaction mixture was poured into a mixture of AcOEt-H2O and the organic layer was washed with aqueous ammonium chloride, aqueous sodium hydrogen carbonate, and brine and dried over MgSO4. The solvent was evaporated in vacuo and the residue was crystallized from ethyl acetate and hexane to give tert-butyl [(1R)-1-{[(cyclohexylmethyl)amino]carbonyl}-3-(methylthio)propyl]carbamate (5.65 g).

Workup

  1. washthe organic layer was washed with aqueous ammonium chloride, aqueous sodium hydrogen carbonate, and brine
  2. dry with materialdried over MgSO4
  3. customThe solvent was evaporated in vacuo
  4. customthe residue was crystallized from ethyl acetate and hexane

Sources & evidence

ORD record
ord-764b1583227b45a88d48b73d9fba3998
Source dataset
uspto-grants-2008_12
Patent number
US07465731B2

Reaction notes

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