1,2-Dichloroethane → Benzyl{(1S)-4-[(tert-butoxycarbonyl)amino]-1-[({(4S)-4-[(tert-butoxycarbonyl)amino]-5-hydroxypentyl}amino)carbonyl]butyl}carbamate

HRID 269679Notes

Reaction equation

HRID 269679 reaction equation
[CH2:1]([O:8][C:9]([NH:11][C@H:12]([C:24]([OH:26])=O)[CH2:13][CH2:14][CH2:15][NH:16][C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:27]([O:31][C:32](=[O:41])[NH:33][C@H:34]([CH2:39][OH:40])[CH2:35][CH2:36][CH2:37][NH2:38])([CH3:30])([CH3:29])[CH3:28].C(Cl)CCl.C1C=CC2N(O)N=NC=2C=1>CN(C)C=O>[CH2:1]([O:8][C:9](=[O:10])[NH:11][C@H:12]([C:24]([NH:38][CH2:37][CH2:36][CH2:35][C@H:34]([NH:33][C:32]([O:31][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:41])[CH2:39][OH:40])=[O:26])[CH2:13][CH2:14][CH2:15][NH:16][C:17]([O:19][C:20]([CH3:21])([CH3:22])[CH3:23])=[O:18])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 111,2-DichloroethaneHCID 757711-HydroxybenzotriazoleHCID 7350734Z-Ndelta-Boc-L-ornithineHCID 88986916HCID 88986916, compound

Product 1

HCID 86625287Benzyl{(1S)-4-[(tert-butoxycarbonyl)amino]-1-[({(4S)-4-[(tert-butoxycarbonyl)amino]-5-hydroxypentyl}amino)carbonyl]butyl}carbamate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Under argon, 0.155 g (0.42 mmol) of N2-[(benzyloxy)carbonyl]-N5-(tert-butoxycarbonyl)-L-ornithine and 0.12 g (0.55 mmol) of tert-butyl[(1S)-4-amino-1-(hydroxymethyl)butyl]carbamate (Example 247A) are dissolved in 6 ml of dimethylformamide. Then, at 0° C. (ice bath), 0.105 g (0.55 mmol) of EDC and 0.017 g (0.13 mmol) of HOBt are added. The mixture is slowly warmed to RT and stirred at RT for 12 h. The solution is concentrated in vacuo and the residue is taken up with ethyl acetate. The organic phase is washed successively with saturated sodium bicarbonate and sodium chloride solutions, dried over magnesium sulfate and evaporated in vacuo. The remaining solid is purified by preparative HPLC (Kromasil, mobile phase acetonitrile/0.25% aqueous trifluoroacetic acid 5:95→95:5).

Workup

  1. concentrationThe solution is concentrated in vacuo
  2. washThe organic phase is washed successively with saturated sodium bicarbonate and sodium chloride solutions
  3. dry with materialdried over magnesium sulfate
  4. customevaporated in vacuo
  5. customThe remaining solid is purified by preparative HPLC (Kromasil, mobile phase acetonitrile/0.25% aqueous trifluoroacetic acid 5:95→95:5)

Sources & evidence

ORD record
ord-b9091529bc9440bca5e74681b4ce68fc
Source dataset
uspto-grants-2008_11
Patent number
US07446102B2

Reaction notes

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