1,2-Dichloroethane → N'-((2R,3S)-2-(7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)benzohydrazide

HRID 2388522Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2388522
[C:1]([C:3]1[C:8]2[S:9][CH:10]=[CH:11][C:7]=2[C:6]([NH:12][C@H:13]([C@@H:17]([OH:19])[CH3:18])[C:14]([OH:16])=O)=[CH:5][CH:4]=1)#[N:2].[C:20]([NH:28][NH2:29])(=[O:27])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.C1C=CC2N(O)N=NC=2C=1.C(Cl)CCl.CCN(CC)CC>C1COCC1.CN(C=O)C>[C:1]([C:3]1[C:8]2[S:9][CH:10]=[CH:11][C:7]=2[C:6]([NH:12][C@H:13]([C@@H:17]([OH:19])[CH3:18])[C:14]([NH:29][NH:28][C:20](=[O:27])[C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[O:16])=[CH:5][CH:4]=1)#[N:2]

Komponenten

7

Edukt 5

HCID 111,2-DichloroethaneHCID 8471TriethylamineHCID 11955BenzoylhydrazineHCID 757711-HydroxybenzotriazoleHCID 67006652(2R,3S)-2-(7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoic acid2×

Produkt 1

HCID 67006447N'-((2R,3S)-2-(7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)benzohydrazideAusbeute 76,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 21974620tetrahydrofuran N,N-dimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a mixture of (2R,3S)-2-(7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoic acid (intermediate 60a) (0.66 g, 2.39 mmol), benzoic hydrazide (330 mg, 2.42 mmol), HOBt (328 mg, 2.42 mmol) in THF:DMF (1:1) (30 mL) was added EDC (698 mg, 3.64 mmol) and Et3N (0.51 mL, 3.66 mmol) at 0° C. The mixture was stirred at 0° C. for 30 min., then at room temperature overnight. The reaction was quenched by adding water and extracted with EtOAc. The EtOAc extracts were washed with water, brine and dried over Na2SO4. Removal of the solvent and purification of the residue gave the title compound N′-((2R,3S)-2-(7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)benzohydrazide (0.72 g, 76%). 1H NMR (400 MHz, Acetone-d6, δ in ppm) 7.94 (m, 2H), 7.82 (d, J=5.7 Hz, 1H), 7.73 (d, J=5.7 Hz, 1H), 7.68 (d, J=8.2 Hz, 1H), 7.59 (m, 1H), 7.50 (m, 2H), 6.66 (d, J=8.2 Hz, 1H), 6.20 (d, J=7.4 Hz, 1H), 4.41 (m, 1H), 4.22 (dd, J=3.5, 7.4 Hz, 1H), 1.39 (d, J=6.4 Hz, 3H).

Aufarbeitung

  1. customat room temperature
  2. customovernight
  3. customThe reaction was quenched
  4. additionby adding water
  5. extractionextracted with EtOAc
  6. washThe EtOAc extracts were washed with water, brine
  7. dry with materialdried over Na2SO4
  8. customRemoval of the solvent and purification of the residue

Quellen und Nachweise

ORD-Eintrag
ord-1f4ef3f4a6e342ccaee75f189fcd7d69
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08268872B2

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