1,8-Diazabicyclo(5.4.0)undec-7-ene → Methyl 2-(5-chloro-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)-2-diazoacetate

HRID 913918Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 913918
[Cl:1][C:2]1[CH:10]=[C:9]([CH2:11][C:12]([O:14][CH3:15])=[O:13])[C:8]2[C:4](=[CH:5][N:6]([CH2:16][O:17][CH2:18][CH2:19][Si:20]([CH3:23])([CH3:22])[CH3:21])[N:7]=2)[CH:3]=1.C(NC1C=CC(S([N:37]=[N+:38]=[N-])(=O)=O)=CC=1)(=O)C.N12CCCN=C1CCCCC2>C(#N)C>[Cl:1][C:2]1[CH:10]=[C:9]([C:11](=[N+:37]=[N-:38])[C:12]([O:14][CH3:15])=[O:13])[C:8]2[C:4](=[CH:5][N:6]([CH2:16][O:17][CH2:18][CH2:19][Si:20]([CH3:21])([CH3:23])[CH3:22])[N:7]=2)[CH:3]=1

Komponenten

5

Edukt 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 51291854-Acetamidobenzenesulfonyl azideHCID 57545943Methyl 2-(5-chloro-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)acetate

Produkt 1

HCID 76561042Methyl 2-(5-chloro-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)-2-diazoacetate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

To a solution of methyl 2-(5-chloro-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)acetate (1.95 g, 5.49 mmol) and 4-acetamidobenzenesulfonyl azide (1.52 g, 6.32 mmol) in acetonitrile (11 mL) at 0° C. was added 1,8-Diazabicyclo[5.4.0]undec-7-ene (1.04 mL, 6.87 mmol) dropwise over 20 min. The ice bath was removed and stirring continued at room temperature for 1 h. The reaction was partitioned between water and ethyl acetate. The organics were washed with saturated sodium bicarbonate, dried over sodium sulfate, and concentrated. The resulting residue was purified by column chromatography (8%→25% ethyl acetate/n-hexane) to give 1.39 g (66%) as a yellow oil. 1H-NMR (CDC13, 500 MHz) δ 8.01 (s, 1H), 7.79 (d, J=1.5 Hz, 1H), 7.45 (d, J=1.8 Hz, 1H), 5.64 (s, 2H), 3.89 (s, 3H), 3.64 (t, J=8.2 Hz, 2H), 0.93 (t, J=8.4 Hz, 2H), −0.03 (s,9H; 13C NMR (126 MHz, CDCl3) δ ppm 165.9, 143.2, 128.7, 125.3, 123.1, 122.7, 122.5, 116.5, 116.4, 81.8, 67.9, 52.1, 17.8, −1.4.

Aufarbeitung

  1. customThe ice bath was removed
  2. customThe reaction was partitioned between water and ethyl acetate
  3. washThe organics were washed with saturated sodium bicarbonate
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated
  6. customThe resulting residue was purified by column chromatography (8%→25% ethyl acetate/n-hexane)
  7. customto give 1.39 g (66%) as a yellow oil

Quellen und Nachweise

ORD-Eintrag
ord-23c154ffd6f545e5a543a1bb2adafe6e
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08026257B2

Notizen zur Reaktion

Wird geladen…