Diisopropylethylamine → HCID 21310212, compound

HRID 582419Notes

Reaction equation

HRID 582419 reaction equation
[C:1]([O:5][C:6]([N:8]([C@H:10]([CH2:14][C:15]1[CH:24]=[CH:23][C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH:16]=1)[C:11](O)=[O:12])[CH3:9])=[O:7])([CH3:4])([CH3:3])[CH3:2].ON1C2N=CC=CC=2N=N1.Cl.C(N=C=NCCCN(C)C)C.[CH2:47]([N:54]([C:56]([NH:58][CH2:59][CH3:60])=[O:57])[NH2:55])[C:48]1[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=1.C(N(C(C)C)CC)(C)C>ClCCl>[CH2:47]([N:54]([C:56]([NH:58][CH2:59][CH3:60])=[O:57])[NH:55][C:11](=[O:12])[C@H:10]([N:8]([C:6]([O:5][C:1]([CH3:3])([CH3:2])[CH3:4])=[O:7])[CH3:9])[CH2:14][C:15]1[CH:24]=[CH:23][C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH:16]=1)[C:48]1[CH:53]=[CH:52][CH:51]=[CH:50][CH:49]=1

Participants

7

Reactant 5

HCID 81531DiisopropylethylamineHCID 181649HOAtHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 10065151(2R)-2-[methyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]-3-naphthalen-2-ylpropanoic acidHCID 21712328HCID 21712328, compound

Product 1

HCID 21310212HCID 21310212, compoundYield 90.1%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

##STR188## To a solution of (2R)-2-(N-tert-butoxycarbonyl-N-methylamino)-3-(2-naphthyl)propionic acid (2.6 g, 7.9 mmol) in dichloromethane (20 ml) was added 1-hydroxy-7-azabenzotriazole (1.1 g, 8.0 mmol) and 1-ethyl-3-dimethylaminopropyl carbodiimide hydrochloride (1.6 g, 8.6 mmol) and the mixture was stirred at 30 min at room temperature. Then 2-benzyl-4-ethylsemicarbazide (1.3 g, 6.6 mmol) and diisopropylethylamine (1.5 ml, 8.6 mmol) in dichloromethane (20 ml) were added and the mixture was stirred overnight. The mixture was washed with saturated sodium bicarbonate (2×50 ml), dried (magnesium sulfate) and concentrated in vacuo. The obtained product was chromatographed on silica (100 g) with petrol ether/ethyl acetate 1:1 to give 3.0 g (90%) of 2-benzyl-1-[(2R)-2-(N-(tert-butoxycarbonyl)-N-methylamino)-3-(2-naphtyl)propionyl]-4-ethylsemicarbazide.

Workup

  1. stirringthe mixture was stirred overnight
  2. washThe mixture was washed with saturated sodium bicarbonate (2×50 ml)
  3. dry with materialdried (magnesium sulfate)
  4. concentrationconcentrated in vacuo
  5. customThe obtained product was chromatographed on silica (100 g) with petrol ether/ethyl acetate 1:1

Sources & evidence

ORD record
ord-e502c0ac3d454ac1b5c90b1890b1492f
Source dataset
uspto-grants-1999_07
Patent number
US05922770

Reaction notes

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