Triethylamine → Z-Glu(Val-Gly-OBzl)-OBzl

HRID 1055626Notes

Reaction equation

HRID 1055626 reaction equation
[NH2:1][C@H:2]([C:6]([NH:8][CH2:9][C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11])=[O:7])[CH:3]([CH3:5])[CH3:4].Cl.[NH:21]([C:38]([O:40][CH2:41][C:42]1[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=1)=[O:39])[C@H:22]([C:28]([O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[O:29])[CH2:23][CH2:24][C:25](=O)[OH:26].C(N(CC)CC)C.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.Cl>C(Cl)Cl>[NH:21]([C:38]([O:40][CH2:41][C:42]1[CH:43]=[CH:44][CH:45]=[CH:46][CH:47]=1)=[O:39])[C@H:22]([C:28]([O:30][CH2:31][C:32]1[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=1)=[O:29])[CH2:23][CH2:24][C:25]([NH:1][C@H:2]([C:6]([NH:8][CH2:9][C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11])=[O:7])[CH:3]([CH3:5])[CH3:4])=[O:26]

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 6994031(4S)-5-(Benzyloxy)-4-(((benzyloxy)carbonyl)amino)-5-oxopentanoic acidHCID 131729421H-Val-Gly-OBzl.HCl

Product 1

HCID 131729420Z-Glu(Val-Gly-OBzl)-OBzl

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Then, H-Val-Gly-OBzl.HCl and Z-Glu-OBzl (5.57 g, 15.0 mmol) were dissolved in methylene chloride (50 ml), and the solution was kept at 0° C. Triethylamine (2.30 ml, 16.5 mmol), HOBt (1-hydroxybenzotriazole, 2.53 g, 16.5 mmol), and WSC.HCl (1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride, 3.16 g, 16.5 mmol) were added to the solution, and the mixture was stirred at room temperature for 2 days. The reaction mixture was concentrated under reduced pressure, and the residue was dissolved in heated ethyl acetate (1500 ml). The solution was washed with water (200 ml), 5% citric acid aqueous solution (200 ml× twice), saturated brine (150 ml), 5% sodium hydrogencarbonate aqueous solution (200 ml× twice), and saturated brine (150 ml). The organic layer was dried over anhydrous magnesium sulfate, then the magnesium sulfate was removed by filtration, and the filtrate was concentrated under reduced pressure. The deposited crystals were collected by filtration, and dried under reduced pressure to obtain white crystals of Z-Glu(Val-Gly-OBzl)-OBzl (6.51 g, 10.5 mmol).

Workup

  1. customwas kept at 0° C
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. dissolutionthe residue was dissolved in heated ethyl acetate (1500 ml)
  4. washThe solution was washed with water (200 ml), 5% citric acid aqueous solution (200 ml× twice), saturated brine (150 ml), 5% sodium hydrogencarbonate aqueous solution (200 ml× twice), and saturated brine (150 ml)
  5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  6. customthe magnesium sulfate was removed by filtration
  7. concentrationthe filtrate was concentrated under reduced pressure
  8. filtrationThe deposited crystals were collected by filtration
  9. customdried under reduced pressure

Sources & evidence

ORD record
ord-cccd072ea150491eb78589e7b440fe9c
Source dataset
uspto-grants-2016_07
Patent number
US09395376B2

Reaction notes

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