Ethyl Acetate → N-(N-Acetyl-tyrosinyl-valinyl-(4(R)-allyloxy prolinyl))-3(S)-amino-4-oxobutanoic acid

HRID 1741523Notes

Reaction equation

HRID 1741523 reaction equation
Cl.CO[C:4](=[O:14])[C@@H:5]1[CH2:9][C@@H:8]([O:10][CH2:11][CH:12]=[CH2:13])[CH2:7][NH:6]1.[NH:15]([C:35]([CH3:37])=[O:36])[C@H:16]([C:25]([NH:27][C@H:28]([C:32]([OH:34])=O)[CH:29]([CH3:31])[CH3:30])=[O:26])[CH2:17][C:18]1[CH:23]=[CH:22][C:21]([OH:24])=[CH:20][CH:19]=1.C([N:41]([CH:44]([CH3:46])[CH3:45])CC)(C)C.[OH:47]N1C2C=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.[C:69]([O:72]CC)(=[O:71])C>ClCCl.CN(C)C=O>[C:35]([NH:15][C@H:16]([C:25]([NH:27][C@H:28]([C:32]([N:6]1[CH2:7][C@H:8]([O:10][CH2:11][CH:12]=[CH2:13])[CH2:9][C@H:5]1[C:4]([NH:41][C@H:44]([CH:45]=[O:47])[CH2:46][C:69]([OH:72])=[O:71])=[O:14])=[O:34])[CH:29]([CH3:30])[CH3:31])=[O:26])[CH2:17][C:18]1[CH:19]=[CH:20][C:21]([OH:24])=[CH:22][CH:23]=1)(=[O:36])[CH3:37]

Participants

9

Reactant 6

HCID 8857Ethyl AcetateHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 22875497N-Acetyl-tyrosinyl-valineHCID 668534754(R)-Allyloxyproline methyl ester hydrochloride

Product 1

HCID 59901771N-(N-Acetyl-tyrosinyl-valinyl-(4(R)-allyloxy prolinyl))-3(S)-amino-4-oxobutanoic acid

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

N-Acetyl-tyrosinyl-valinyl-(4(R)-allyloxyproline) methyl enter. 4(R)-Allyloxyproline methyl ester hydrochloride (1.05 g, 4.75 mmol) and N-acetyl-Tyr-Val-OH (1.68 g, 5.21 mmol) were dissolved in 10 ml of a 1:1 mixture of dichloromethane and dimethylformamide and cooled to 0° C. Diisopropylethylamine (1 ml, 5.93 mmol) was added to the cooled mixture followed by the addition of N-hydroxybenzotriazole (0.769 g, 5.69 mmol) and 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.18 g, 6.2 mmol). After stirring for 2 hours, the mixture was warmed to room temperature and stirred for 16 hours. The reaction was poured into 150 ml of ethyl acetate and washed with 50 ml each of water, 10% sodium hydrogen sulfate, and 10% sodium bicarbonate. The organic layer was dried over sodium sulfate, filtered, and evaporated to give a light yellow solid. This was purified by flash chromatography eluting with dichloromethane/methanol/pyridine (100:3:0.5) to give 780 mg of the title compound. 1H NMR (CD3OD) δ7.02-6.96 (2H, d), 6.67-6.63 (2H, d), 5.95-5.85 (1H, m), 5.34-5.27 (1H, d), 5.16-5.13 (1H, d), 4.53-4.38 (3H, m), 4.28-4.22 (1H, m), 4.12-3.97 (3H, m), 3.82-3.73 (1H, m), 3.72 (3H, s), 3.04-2.88 (2H, m), 2.85-2.72 (2H, m), 2.45-2.34 (1H, m), 2.08-1.95 (2H, m), 1.92 (3H, s), 1.00-0.92 (6H, 2×d).

Workup

  1. temperaturethe mixture was warmed to room temperature
  2. stirringstirred for 16 hours
  3. washwashed with 50 ml each of water, 10% sodium hydrogen sulfate, and 10% sodium bicarbonate
  4. dry with materialThe organic layer was dried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated
  7. customto give a light yellow solid
  8. customThis was purified by flash chromatography
  9. washeluting with dichloromethane/methanol/pyridine (100:3:0.5)

Sources & evidence

ORD record
ord-c00de5611ae346f78bfcc03e4f37540b
Source dataset
uspto-grants-1999_10
Patent number
US05973111

Reaction notes

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