1-Hydroxybenzotriazole → 2,6-dichloro-4-[[[(1R)-1-(1-naphthalenyl)ethyl]amino)carbonyl]benzoic acid, methyl ester

HRID 393032

Reaktionsgleichung

Reaktionsgleichung von HRID 393032
[Cl:1][C:2]1[CH:7]=[C:6]([C:8]([O-:10])=O)[CH:5]=[C:4]([Cl:11])[C:3]=1[C:12]([O:14][CH3:15])=[O:13].[C:16]1([C@H:26]([NH2:28])[CH3:27])[C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[CH:19]=[CH:18][CH:17]=1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C1C=CC2N(O)N=NC=2C=1.C(N(C(C)C)CC)(C)C>CN(C)C=O>[Cl:11][C:4]1[CH:5]=[C:6]([C:8]([NH:28][C@@H:26]([C:16]2[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[CH:19]=[CH:18][CH:17]=2)[CH3:27])=[O:10])[CH:7]=[C:2]([Cl:1])[C:3]=1[C:12]([O:14][CH3:15])=[O:13]

Komponenten

7

Edukt 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 2724264(+)-1-(1-Naphthyl)ethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 857711412,6-Dichlorobenzene-1,4-dicarboxylic acid, 1-methyl ester

Produkt 1

HCID 865851452,6-dichloro-4-[[[(1R)-1-(1-naphthalenyl)ethyl]amino)carbonyl]benzoic acid, methyl esterAusbeute 96 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A solution of 2,6-dichlorobenzene-1,4-dicarboxylic acid, 1-methyl ester (Example 4; 3.00 g, 12.0 mmol), (R)-(+)-1-(1-naphthyl)ethylamine (2.00 g, 11.7 mmol), HBTU (5.68 g, 15.0 mmol), HOBT (2.04 g, 15.1 mmol), and diisopropylethylamine (6.20 g, 48.0 mmol) in N,N-dimethylformamide (50 mL) was stirred at room temperature over the weekend. The solvent was evaporated and ethyl acetate (150 mL) was added. The solution was washed with 1 M HCl (100 mL) and the aqueous layer was back-extracted with ethyl, acetate (100 mL). The combined organic layers were washed with saturated aqueous sodium hydrogen carbonate and brine (200 mL each), then dried (MgSO4), filtered, evaporated and chromatographed (30% ethyl acetate/hexanes) to give 2,6-dichloro-4-[[[(1R)-1-(1-naphthalenyl)ethyl]amino]carbonyl]benzoic acid, methyl ester (4.52 g, 96%) as a white foam.

Aufarbeitung

  1. customThe solvent was evaporated
  2. additionethyl acetate (150 mL) was added
  3. washThe solution was washed with 1 M HCl (100 mL)
  4. extractionthe aqueous layer was back-extracted with ethyl, acetate (100 mL)
  5. washThe combined organic layers were washed with saturated aqueous sodium hydrogen carbonate and brine (200 mL each)
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. customevaporated
  9. customchromatographed (30% ethyl acetate/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-c939f1f15fa5473a8d2b7ba0072986b0
Quelldatensatz
uspto-grants-2004_10
Patentnummer
US06803384B2

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